900 (nine hundred) is the

natural number In mathematics, the natural numbers are those numbers used for counting (as in "there are ''six'' coins on the table") and ordering (as in "this is the ''third'' largest city in the country"). Numbers used for counting are called ''cardinal ...

following 899 and preceding 901. It is the

square In Euclidean geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90- degree angles, π/2 radian angles, or right angles). It can also be defined as a rectangle with two equal-length a ...

of 30 and the sum of Euler's totient function for the first 54 positive integers. In base 10 it is a Harshad number. It is also the first number to be the square of a sphenic number.

In other fields

900 is also: * A telephone area code for "premium" phone calls in the

North American Numbering Plan The North American Numbering Plan (NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the international calling ...

* In Greek number symbols, the sign

Sampi Sampi (modern: ϡ; ancient shapes: , ) is an archaic letter of the Greek alphabet. It was used as an addition to the classical 24-letter alphabet in some eastern Ionic dialects of ancient Greek in the 6th and 5th centuries BC, to denote some t ...

("ϡ", literally "like a pi") * A skateboarding trick in which the skateboarder spins two and a half times (360 degrees times 2.5 is 900) * A 900 series refers to three consecutive

perfect games Perfect game may refer to: Sports * Perfect game (baseball), a complete-game win by a pitcher allowing no baserunners * Perfect game (bowling), a 300 game, 12 consecutive strikes in the same game * Perfect Game Collegiate Baseball League, New York ...

bowling Bowling is a target sport and recreational activity in which a player rolls a ball toward pins (in pin bowling) or another target (in target bowling). The term ''bowling'' usually refers to pin bowling (most commonly ten-pin bowling), thou ...

* Yoda's age in Star Wars

Integers from 901 to 999

900s

* 901 = 17 × 53,

centered triangular number A centered (or centred) triangular number is a centered figurate number that represents an equilateral triangle with a dot in the center and all its other dots surrounding the center in successive equilateral triangular layers. The followin ...

happy number In number theory, a happy number is a number which eventually reaches 1 when replaced by the sum of the square of each digit. For instance, 13 is a happy number because 1^2+3^2=10, and 1^2+0^2=1. On the other hand, 4 is not a happy number because ...

* 902 = 2 × 11 × 41,

sphenic number In number theory, a sphenic number (from grc, σφήνα, 'wedge') is a positive integer that is the product of three distinct prime numbers. Because there are infinitely many prime numbers, there are also infinitely many sphenic numbers. Definit ...

nontotient In number theory, a nontotient is a positive integer ''n'' which is not a totient number: it is not in the range of Euler's totient function φ, that is, the equation φ(''x'') = ''n'' has no solution ''x''. In other words, ''n'' is a nontotien ...

, Harshad number * 903 = 3 × 7 × 43, sphenic number, triangular number,

Schröder–Hipparchus number In combinatorics, the Schröder–Hipparchus numbers form an integer sequence that can be used to count the number of plane trees with a given set of leaves, the number of ways of inserting parentheses into a sequence, and the number of ways of d ...

Mertens function In number theory, the Mertens function is defined for all positive integers ''n'' as : M(n) = \sum_^n \mu(k), where \mu(k) is the Möbius function. The function is named in honour of Franz Mertens. This definition can be extended to positive re ...

(903) returns 0, little Schroeder number * 904 = 2³ × 113 or 113 × 8, Mertens function(904) returns 0, lazy caterer number, number of 1's in all partitions of 26 into odd parts * 905 = 5 × 181, sum of seven consecutive primes (109 + 113 + 127 + 131 + 137 + 139 + 149), smallest composite de Polignac number ** "The 905" is a common nickname for the suburban portions of the Greater Toronto Area in Canada, a region whose telephones used area code 905 before

overlay plan Overlay may refer to: Computers * Overlay network, a computer network which is built on top of another network * Hardware overlay, one type of video overlay that uses memory dedicated to the application *Another term for exec, replacing one proce ...

s added two more area codes. * 906 = 2 × 3 × 151, strobogrammatic, sphenic number, Mertens function(906) returns 0 * 907 = prime number * 908 = 2² × 227, nontotient, number of primitive sorting networks on 6 elements, number of rhombic tilings of a 12-gon * 909 = 3² × 101, number of non-isomorphic aperiodic multiset partitions of weight 7

910s

* 910 = 2 × 5 × 7 × 13, Mertens function(910) returns 0, Harshad number,

, balanced number, number of polynomial symmetric functions of matrix of order 7 under separate row and column permutations *

911 911 or 9/11 may refer to: Dates * AD 911 * 911 BC * September 11 ** 9/11, the September 11 attacks of 2001 ** 11 de Septiembre, Chilean coup d'état in 1973 that outed the democratically elected Salvador Allende * November 9 Numbers * 91 ...

Sophie Germain Marie-Sophie Germain (; 1 April 1776 – 27 June 1831) was a French mathematician, physicist, and philosopher. Despite initial opposition from her parents and difficulties presented by society, she gained education from books in her father's lib ...

prime number, also the

emergency telephone number Most public switched telephone networks have a single emergency telephone number (sometimes known as the universal emergency telephone number or the emergency services number) that allows a caller to contact local emergency services for assis ...

in North America * 912 = 2⁴ × 3 × 19, sum of four consecutive primes (223 + 227 + 229 + 233), sum of ten consecutive primes (71 + 73 + 79 + 83 + 89 + 97 + 101 + 103 + 107 + 109), Harshad number. * 913 = 11 × 83,

Smith number In number theory, a Smith number is a composite number for which, in a given number base, the sum of its digits is equal to the sum of the digits in its prime factorization in the given number base. In the case of numbers that are not square-f ...

, Mertens function(913) returns 0. * 914 = 2 × 457, nontotient, number of compositions of 11 that are neither weakly increasing nor weakly decreasing * 915 = 3 × 5 × 61, sphenic number, Smith number, Mertens function(915) returns 0, Harshad number * 916 = 2² × 229, Mertens function(916) returns 0, nontotient, strobogrammatic, member of the

Mian–Chowla sequence In mathematics, the Mian–Chowla sequence is an integer sequence defined recursively in the following way. The sequence starts with :a_1 = 1. Then for n>1, a_n is the smallest integer such that every pairwise sum :a_i + a_j is distinct, for ...

* 917 = 7 × 131, sum of five consecutive primes (173 + 179 + 181 + 191 + 193) * 918 = 2 × 3³ × 17, Harshad number * 919 = prime number,

cuban prime A cuban prime is a prime number that is also a solution to one of two different specific equations involving differences between third powers of two integers ''x'' and ''y''. First series This is the first of these equations: :p = \frac,\ x = ...

, prime index prime,

Chen prime A prime number ''p'' is called a Chen prime if ''p'' + 2 is either a prime or a product of two primes (also called a semiprime). The even number 2''p'' + 2 therefore satisfies Chen's theorem. The Chen primes are named after Chen Jingru ...

, palindromic prime, centered hexagonal number, Mertens function(919) returns 0

920s

* 920 = 2³ × 5 × 23, Mertens function(920) returns 0, total number of nodes in all rooted trees with 8 nodes * 921 = 3 × 307, number of enriched r-trees of size 7 * 922 = 2 × 461, nontotient, Smith number * 923 = 13 × 71, number of combinations of 6 things from 1 to 6 at a time * 924 = 2² × 3 × 7 × 11, sum of a twin prime (461 + 463), central binomial coefficient

\tbinom  6

* 925 = 5² × 37,

pentagonal number A pentagonal number is a figurate number that extends the concept of triangular and square numbers to the pentagon, but, unlike the first two, the patterns involved in the construction of pentagonal numbers are not rotationally symmetrical. The ...

centered square number In elementary number theory, a centered square number is a centered figurate number that gives the number of dots in a square with a dot in the center and all other dots surrounding the center dot in successive square layers. That is, each cen ...

** The

millesimal fineness The fineness of a precious metal object (coin, bar, jewelry, etc.) represents the weight of ''fine metal'' therein, in proportion to the total weight which includes alloying base metals and any impurities. Alloy metals are added to increase hardne ...

number for

Sterling silver Sterling silver is an alloy of silver containing 92.5% by weight of silver and 7.5% by weight of other metals, usually copper. The sterling silver standard has a minimum millesimal fineness of 925. '' Fine silver'', which is 99.9% pure silver, i ...

* 926 = 2 × 463, sum of six consecutive primes (139 + 149 + 151 + 157 + 163 + 167), nontotient * 927 = 3² × 103,

tribonacci number In mathematics, the Fibonacci numbers form a sequence defined recursively by: :F_n = \begin 0 & n = 0 \\ 1 & n = 1 \\ F_ + F_ & n > 1 \end That is, after two starting values, each number is the sum of the two preceding numbers. The Fibonacci seque ...

* 928 = 2⁵ × 29, sum of four consecutive primes (227 + 229 + 233 + 239), sum of eight consecutive primes (101 + 103 + 107 + 109 + 113 + 127 + 131 + 137),

* 929 = prime number,

Proth prime A Proth number is a natural number ''N'' of the form N = k \times 2^n +1 where ''k'' and ''n'' are positive integers, ''k'' is odd and 2^n > k. A Proth prime is a Proth number that is prime. They are named after the French mathematician François ...

, palindromic prime, sum of nine consecutive primes (83 + 89 + 97 + 101 + 103 + 107 + 109 + 113 + 127),

Eisenstein prime In mathematics, an Eisenstein prime is an Eisenstein integer : z = a + b\,\omega, \quad \text \quad \omega = e^, that is irreducible (or equivalently prime) in the ring-theoretic sense: its only Eisenstein divisors are the units , itself ...

with no imaginary part ** An area code in New York.

930s

* 930 = 2 × 3 × 5 × 31,

pronic number A pronic number is a number that is the product of two consecutive integers, that is, a number of the form n(n+1).. The study of these numbers dates back to Aristotle. They are also called oblong numbers, heteromecic numbers,. or rectangular number ...

* 931 = 7² × 19; sum of three consecutive primes (307 + 311 + 313); double

repdigit In recreational mathematics, a repdigit or sometimes monodigit is a natural number composed of repeated instances of the same digit in a positional number system (often implicitly decimal). The word is a portmanteau of repeated and digit. Example ...

, 111₃₀ and 777₁₁; number of regular simple graphs spanning 7 vertices * 932 = 2² × 233, number of regular simple graphs on 7 labeled nodes * 933 = 3 × 311 * 934 = 2 × 467, nontotient * 935 = 5 × 11 × 17, sphenic number, Lucas–Carmichael number, Harshad number * 936 = 2³ × 3² × 13,

pentagonal pyramidal number A pyramidal number is a figurate number that represents a pyramid with a polygonal base and a given number of triangular sides. A pyramidal number is the number of points in a pyramid where each layer of the pyramid is an -sided polygon of points. ...

, Harshad number * 937 = prime number, Chen prime,

star number A star number is a centered figurate number, a centered hexagram (six-pointed star), such as the Star of David, or the board Chinese checkers is played on. The ''n''th star number is given by the formula ''Sn'' = 6''n''(''n'' − 1) + 1. The ...

* 938 = 2 × 7 × 67, sphenic number, nontotient, number of lines through at least 2 points of an 8 × 8 grid of points * 939 = 3 × 313, number of V-toothpicks after 31 rounds of the honeycomb sequence

940s

* 940 = 2² × 5 × 47, totient sum for first 55 integers * 941 = prime number, sum of three consecutive primes (311 + 313 + 317), sum of five consecutive primes (179 + 181 + 191 + 193 + 197), Chen prime, Eisenstein prime with no imaginary part * 942 = 2 × 3 × 157, sphenic number, sum of four consecutive primes (229 + 233 + 239 + 241), nontotient, convolved Fibonacci number * 943 = 23 × 41 * 944 = 2⁴ × 59, nontotient, Lehmer-Comtet number * 945 = 3³ × 5 × 7, double factorial of 9, smallest odd

abundant number In number theory, an abundant number or excessive number is a number for which the sum of its proper divisors is greater than the number. The integer 12 is the first abundant number. Its proper divisors are 1, 2, 3, 4 and 6 for a total of 16. Th ...

(divisors less than itself add up to 975); smallest odd primitive abundant number; smallest odd primitive semiperfect number;

Leyland number In number theory, a Leyland number is a number of the form :x^y + y^x where ''x'' and ''y'' are integers greater than 1. They are named after the mathematician Paul Leyland. The first few Leyland numbers are : 8, 17, 32, 54, 57, 100, 145, 177, ...

* 946 = 2 × 11 × 43, sphenic number, triangular number,

hexagonal number A hexagonal number is a figurate number. The ''n''th hexagonal number ''h'n'' is the number of ''distinct'' dots in a pattern of dots consisting of the ''outlines'' of regular hexagons with sides up to n dots, when the hexagons are overlaid so ...

* 947 = prime number, sum of seven consecutive primes (113 + 127 + 131 + 137 + 139 + 149 + 151), balanced prime,

, lazy caterer number,

with no imaginary part * 948 = 2² × 3 × 79, nontotient, forms a

Ruth–Aaron pair In mathematics, a Ruth–Aaron pair consists of two consecutive integers (e.g., 714 and 715) for which the sums of the prime factors of each integer are equal: :714 = 2 × 3 × 7 × 17, :715 = 5 × 11 × 13, and : 2 + 3 + 7 + 17 = 5 + 11 + 13 ...

with 949 under second definition, number of combinatory separations of normal multisets of weight 6. * 949 = 13 × 73, forms a Ruth–Aaron pair with 948 under second definition

950s

* 950 = 2 × 5² × 19, nontotient, generalized pentagonal number ** one of two

ISBN The International Standard Book Number (ISBN) is a numeric commercial book identifier that is intended to be unique. Publishers purchase ISBNs from an affiliate of the International ISBN Agency. An ISBN is assigned to each separate edition an ...

Group Identifiers for books published in

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...

* 951 = 3 × 317,

centered pentagonal number A centered pentagonal number is a centered figurate number that represents a pentagon with a dot in the center and all other dots surrounding the center in successive pentagonal layers. The centered pentagonal number for ''n'' is given by th ...

** one of two ISBN Group Identifiers for books published in Finland * 952 = 2³ × 7 × 17, number of reduced words of length 3 in the Weyl group D_17, number of regions in regular tetradecagon with all diagonals drawn. ** 952 is also '' 9-5-2,'' a

card game A card game is any game using playing cards as the primary device with which the game is played, be they traditional or game-specific. Countless card games exist, including families of related games (such as poker). A small number of card ga ...

similar to

bridge A bridge is a structure built to span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually somethi ...

. ** one of two ISBN Group Identifiers for books published in Finland * 953 = prime number, Sophie Germain prime, Chen prime, Eisenstein prime with no imaginary part,

centered heptagonal number A centered heptagonal number is a centered figurate number that represents a heptagon with a dot in the center and all other dots surrounding the center dot in successive heptagonal layers. The centered heptagonal number for ''n'' is given by ...

** ISBN Group Identifier for books published in

Croatia , image_flag = Flag of Croatia.svg , image_coat = Coat of arms of Croatia.svg , anthem = "Lijepa naša domovino"("Our Beautiful Homeland") , image_map = , map_caption = , capit ...

* 954 = 2 × 3² × 53, sum of ten consecutive primes (73 + 79 + 83 + 89 + 97 + 101 + 103 + 107 + 109 + 113), nontotient, Harshad number, sixth derivative of x^(x^x) at x=1. ** ISBN Group Identifier for books published in Bulgaria. Also one of the Area Codes in the South Florida Area * 955 = 5 × 191, number of transitive rooted trees with 17 nodes ** ISBN Group Identifier for books published in Sri Lanka * 956 = 2² × 239, number of compositions of 13 into powers of 2. ** ISBN Group Identifier for books published in Chile * 957 = 3 × 11 × 29, sphenic number, antisigma(45) ** one of two ISBN Group Identifiers for books published in Taiwan and China * 958 = 2 × 479, nontotient,

** ISBN Group Identifier for books published in Colombia ** The

number for

Britannia silver Britannia silver is an alloy of silver containing 11 ozt 10 dwt (i.e. 11½ troy oz.) silver in the pound troy, equivalent to , or 95.833% by weight (mass) silver, the rest usually being copper. This standard was introduced in England by Act of ...

* 959 = 7 × 137, composite de Polignac number ** ISBN Group Identifier for books published in Cuba

960s

* 960 = 2⁶ × 3 × 5, sum of six consecutive primes (149 + 151 + 157 + 163 + 167 + 173), Harshad number ** country calling code for Maldives, ISBN Group Identifier for books published in Greece ** The number of possible starting positions for the chess variant

Chess960 Fischer random chess, also known as Chess960 (often read in this context as 'chess nine-sixty' instead of 'chess nine hundred sixty'), is a variation of the game of chess invented by the former world chess champion Bobby Fischer. Fischer annou ...

* 961 = 31², the largest 3-digit perfect square, sum of three consecutive primes (313 + 317 + 331), sum of five consecutive primes (181 + 191 + 193 + 197 + 199),

centered octagonal number A centered octagonal number is a centered figurate number that represents an octagon with a dot in the center and all other dots surrounding the center dot in successive octagonal layers.. The centered octagonal numbers are the same as the od ...

** country calling code for Lebanon, ISBN Group Identifier for books published in

Slovenia Slovenia ( ; sl, Slovenija ), officially the Republic of Slovenia (Slovene: , abbr.: ''RS''), is a country in Central Europe. It is bordered by Italy to the west, Austria to the north, Hungary to the northeast, Croatia to the southeast, an ...

* 962 = 2 × 13 × 37, sphenic number, nontotient ** country calling code for Jordan, one of two ISBN Group Identifiers for books published in Hong Kong * 963 = 3² × 107, sum of the first twenty-four primes ** country calling code for Syria, ISBN Group Identifier for books published in Hungary * 964 = 2² × 241, sum of four consecutive primes (233 + 239 + 241 + 251), nontotient, totient sum for first 56 integers ** country calling code for Iraq, ISBN Group Identifier for books published in Iran,

* 965 = 5 × 193 ** country calling code for Kuwait, ISBN Group Identifier for books published in Israel * 966 = 2 × 3 × 7 × 23 =

\left\

, sum of eight consecutive primes (103 + 107 + 109 + 113 + 127 + 131 + 137 + 139), Harshad number ** country calling code for Saudi Arabia, one of two ISBN Group Identifiers for books published in Ukraine * 967 = prime number, prime index prime ** country calling code for Yemen, one of two ISBN Group Identifiers for books published in Malaysia * 968 = 2³ × 11², nontotient,

Achilles number An Achilles number is a number that is powerful but not a perfect power. A positive integer is a powerful number if, for every prime factor of , is also a divisor. In other words, every prime factor appears at least squared in the factoriza ...

, area of a square with diagonal 44 ** country calling code for Oman, one of two ISBN Group Identifiers for books published in Mexico * 969 = 3 × 17 × 19, sphenic number,

nonagonal number A nonagonal number (or an enneagonal number) is a figurate number that extends the concept of triangular and square numbers to the nonagon (a nine-sided polygon). However, unlike the triangular and square numbers, the patterns involved in the constr ...

tetrahedral number A tetrahedral number, or triangular pyramidal number, is a figurate number that represents a pyramid with a triangular base and three sides, called a tetrahedron. The th tetrahedral number, , is the sum of the first triangular numbers, that is, ...

** ISBN Group Identifier for books published in Pakistan, age of

Methuselah Methuselah () ( he, מְתוּשֶׁלַח ''Məṯūšélaḥ'', in pausa ''Məṯūšālaḥ'', "His death shall send" or "Man of the javelin" or "Death of Sword"; gr, Μαθουσάλας ''Mathousalas'') was a biblical patriarch and a f ...

according to Old Testament, anti-Muslim movement in Myanmar

970s

* 970 = 2 × 5 × 97, sphenic number,

heptagonal number A heptagonal number is a figurate number that is constructed by combining heptagons with ascending size. The ''n''-th heptagonal number is given by the formula :H_n=\frac. The first few heptagonal numbers are: : 0, 1, 7, 18, 34, 55, 81, 112 ...

** country calling code for Palestinian territories, one of two ISBN Group Identifiers for books published in Mexico *

971 Year 971 ( CMLXXI) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. Events By place Byzantine Empire * Battle of Dorostolon: A Byzantine expeditionary army (possibly 30–40,000 men) ...

= prime number, Chen prime, Eisenstein prime with no imaginary part ** country calling code for United Arab Emirates, ISBN Group Identifier for books published in the Philippines * 972 = 2² × 3⁵, Harshad number,

** country calling code for Israel, one of two ISBN Group Identifiers for books published in Portugal * 973 = 7 × 139,

** country calling code for Bahrain, ISBN Group Identifier for books published in Romania, * 974 = 2 × 487, nontotient, 974! - 1 is prime ** country calling code for Qatar, ISBN Group Identifier for books published in Thailand * 975 = 3 × 5² × 13 ** country calling code for Bhutan, ISBN Group Identifier for books published in Turkey * 976 = 2⁴ × 61,

decagonal number A decagonal number is a figurate number that extends the concept of triangular and square numbers to the decagon (a ten-sided polygon). However, unlike the triangular and square numbers, the patterns involved in the construction of decagonal number ...

** country calling code for Mongolia, ISBN Group Identifier for books published in Antigua,

Bahamas The Bahamas (), officially the Commonwealth of The Bahamas, is an island country within the Lucayan Archipelago of the West Indies in the North Atlantic. It takes up 97% of the Lucayan Archipelago's land area and is home to 88% of the ar ...

Barbados Barbados is an island country in the Lesser Antilles of the West Indies, in the Caribbean region of the Americas, and the most easterly of the Caribbean Islands. It occupies an area of and has a population of about 287,000 (2019 estimate) ...

Belize Belize (; bzj, Bileez) is a Caribbean and Central American country on the northeastern coast of Central America. It is bordered by Mexico to the north, the Caribbean Sea to the east, and Guatemala to the west and south. It also shares a wate ...

, Cayman Islands, Dominica, Grenada, Guyana,

Jamaica Jamaica (; ) is an island country situated in the Caribbean Sea. Spanning in area, it is the third-largest island of the Greater Antilles and the Caribbean (after Cuba and Hispaniola). Jamaica lies about south of Cuba, and west of His ...

, Montserrat,

Saint Kitts and Nevis Saint Kitts and Nevis (), officially the Federation of Saint Christopher and Nevis, is an island country and microstate consisting of the two islands of Saint Kitts and Nevis, both located in the West Indies, in the Leeward Islands chain ...

St. Lucia Saint Lucia ( acf, Sent Lisi, french: Sainte-Lucie) is an island country of the West Indies in the eastern Caribbean. The island was previously called Iouanalao and later Hewanorra, names given by the native Arawaks and Caribs, two Amerin ...

, St. Vincent and the Grenadines,

Trinidad and Tobago Trinidad and Tobago (, ), officially the Republic of Trinidad and Tobago, is the southernmost island country in the Caribbean. Consisting of the main islands Trinidad and Tobago, and numerous much smaller islands, it is situated south of ...

, and the

British Virgin Islands ) , anthem = "God Save the King" , song_type = Territorial song , song = " Oh, Beautiful Virgin Islands" , image_map = File:British Virgin Islands on the globe (Americas centered).svg , map_caption = , mapsize = 290px , image_map2 = Bri ...

* 977 = prime number, sum of nine consecutive primes (89 + 97 + 101 + 103 + 107 + 109 + 113 + 127 + 131), balanced prime, Chen prime, Eisenstein prime with no imaginary part, Stern prime, strictly non-palindromic number ** country calling code for Nepal **

EAN Ean may refer to: People * Ean Campbell (1856–1921), Anglican bishop in the early 20th century * Ean Elliot Clevenger, multi-instrumentalist, vocalist, and songwriter * Ean Evans (1960–2009), bassist for Lynyrd Skynyrd from 2001 until his de ...

prefix for

ISSN An International Standard Serial Number (ISSN) is an eight-digit serial number used to uniquely identify a serial publication, such as a magazine. The ISSN is especially helpful in distinguishing between serials with the same title. ISSNs ...

s ** ISBN Group Identifier for books published in

Egypt Egypt ( ar, مصر , ), officially the Arab Republic of Egypt, is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia via a land bridge formed by the Sinai Peninsula. It is bordered by the Medit ...

* 978 = 2 × 3 × 163, sphenic number, nontotient, number of secondary structures of RNA molecules with 11 nucleotides ** First

prefix for ISBNs ** ISBN Group Identifier for books published in

Nigeria Nigeria ( ), , ig, Naìjíríyà, yo, Nàìjíríà, pcm, Naijá , ff, Naajeeriya, kcg, Naijeriya officially the Federal Republic of Nigeria, is a country in West Africa. It is situated between the Sahel to the north and the Gulf o ...

* 979 = 11 × 89, the sum of the five smallest fourth powers:

979=\sum_^n^4

** Second

prefix for ISBNs. Also for ISMNs ** ISBN Group Identifier for books published in

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...

980s

* 980 = 2² × 5 × 7², number of ways to tile a hexagon of edge 3 wit
calissons
of side 1. ** ISBN Group Identifier for books published in

Venezuela Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and many islands and islets in th ...

* 981 = 3² × 109 ** one of two ISBN Group Identifiers for books published in

Singapore Singapore (), officially the Republic of Singapore, is a sovereign island country and city-state in maritime Southeast Asia. It lies about one degree of latitude () north of the equator, off the southern tip of the Malay Peninsula, bor ...

* 982 = 2 × 491,

** ISBN Group Identifier for books published in the

Cook Islands ) , image_map = Cook Islands on the globe (small islands magnified) (Polynesia centered).svg , capital = Avarua , coordinates = , largest_city = Avarua , official_languages = , lan ...

, Fiji,

Kiribati Kiribati (), officially the Republic of Kiribati ( gil, ibaberikiKiribati),Kiribati
''The Wor ...

Marshall Islands The Marshall Islands ( mh, Ṃajeḷ), officially the Republic of the Marshall Islands ( mh, Aolepān Aorōkin Ṃajeḷ),'' () is an independent island country and microstate near the Equator in the Pacific Ocean, slightly west of the Intern ...

Micronesia Micronesia (, ) is a subregion of Oceania, consisting of about 2,000 small islands in the western Pacific Ocean. It has a close shared cultural history with three other island regions: the Philippines to the west, Polynesia to the east, and ...

, Nauru, New Caledonia,

Niue Niue (, ; niu, Niuē) is an island country in the South Pacific Ocean, northeast of New Zealand. Niue's land area is about and its population, predominantly Polynesian, was about 1,600 in 2016. Niue is located in a triangle between Tong ...

Palau Palau,, officially the Republic of Palau and historically ''Belau'', ''Palaos'' or ''Pelew'', is an island country and microstate in the western Pacific. The nation has approximately 340 islands and connects the western chain of the ...

Solomon Islands Solomon Islands is an island country consisting of six major islands and over 900 smaller islands in Oceania, to the east of Papua New Guinea and north-west of Vanuatu. It has a land area of , and a population of approx. 700,000. Its capit ...

Tokelau Tokelau (; ; known previously as the Union Islands, and, until 1976, known officially as the Tokelau Islands) is a dependent territory of New Zealand in the southern Pacific Ocean. It consists of three tropical coral atolls: Atafu, Nukunonu, a ...

Tonga Tonga (, ; ), officially the Kingdom of Tonga ( to, Puleʻanga Fakatuʻi ʻo Tonga), is a Polynesian country and archipelago. The country has 171 islands – of which 45 are inhabited. Its total surface area is about , scattered over in ...

Tuvalu Tuvalu ( or ; formerly known as the Ellice Islands) is an island country and microstate in the Polynesian subregion of Oceania in the Pacific Ocean. Its islands are situated about midway between Hawaii and Australia. They lie east-nor ...

Vanuatu Vanuatu ( or ; ), officially the Republic of Vanuatu (french: link=no, République de Vanuatu; bi, Ripablik blong Vanuatu), is an island country located in the South Pacific Ocean. The archipelago, which is of volcanic origin, is east of no ...

Western Samoa Samoa, officially the Independent State of Samoa; sm, Sāmoa, and until 1997 known as Western Samoa, is a Polynesian island country consisting of two main islands ( Savai'i and Upolu); two smaller, inhabited islands ( Manono and Apolima); ...

* 983 = prime number,

safe prime In number theory, a prime number ''p'' is a if 2''p'' + 1 is also prime. The number 2''p'' + 1 associated with a Sophie Germain prime is called a . For example, 11 is a Sophie Germain prime and 2 × 11 + ...

, Chen prime, Eisenstein prime with no imaginary part, Wedderburn–Etherington number, strictly non-palindromic number ** One of two ISBN Group Identifiers for books published in

Malaysia Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and federal territories of Malaysia, thirteen states and three federal territories, separated by the South China Sea into two r ...

* 984 = 2³ × 3 × 41 ** ISBN Group Identifier for books published in

Bangladesh Bangladesh (}, ), officially the People's Republic of Bangladesh, is a country in South Asia. It is the eighth-most populous country in the world, with a population exceeding 165 million people in an area of . Bangladesh is among the mos ...

* 985 = 5 × 197, sum of three consecutive primes (317 + 331 + 337),

Markov number A Markov number or Markoff number is a positive integer ''x'', ''y'' or ''z'' that is part of a solution to the Markov Diophantine equation :x^2 + y^2 + z^2 = 3xyz,\, studied by . The first few Markov numbers are : 1, 2, 5, 13, 29, 34, 89 ...

Pell number In mathematics, the Pell numbers are an infinite sequence of integers, known since ancient times, that comprise the denominators of the closest rational approximations to the square root of 2. This sequence of approximations begins , , , , an ...

, Smith number ** one of two ISBN Group Identifiers for books published in

Belarus Belarus,, , ; alternatively and formerly known as Byelorussia (from Russian ). officially the Republic of Belarus,; rus, Республика Беларусь, Respublika Belarus. is a landlocked country in Eastern Europe. It is bordered by ...

* 986 = 2 × 17 × 29, sphenic number, nontotient, strobogrammatic, number of unimodal compositions of 14 where the maximal part appears once ** one of two ISBN Group Identifiers for books published in Taiwan and China * 987 = 3 × 7 × 47,

Fibonacci number In mathematics, the Fibonacci numbers, commonly denoted , form a sequence, the Fibonacci sequence, in which each number is the sum of the two preceding ones. The sequence commonly starts from 0 and 1, although some authors start the sequence from ...

, number of partitions of 52 into prime parts ** one of two ISBN Group Identifiers for books published in Argentina * 988 = 2² × 13 × 19, nontotient. sum of four consecutive primes (239 + 241 + 251 + 257). A

cake number In mathematics, the cake number, denoted by ''Cn'', is the maximum of the number of regions into which a 3-dimensional cube can be partitioned by exactly ''n'' planes. The cake number is so-called because one may imagine each partition of the cu ...

. ** one of two ISBN Group Identifiers for books published in Hong Kong. * 989 = 23 × 43, Extra strong

Lucas pseudoprime Lucas pseudoprimes and Fibonacci pseudoprimes are composite integers that pass certain tests which all primes and very few composite numbers pass: in this case, criteria relative to some Lucas sequence. Baillie-Wagstaff-Lucas pseudoprimes Baill ...

** one of two ISBN Group Identifiers for books published in Portugal

990s

* 990 = 2 × 3² × 5 × 11, sum of six consecutive primes (151 + 157 + 163 + 167 + 173 + 179), triangular number, Harshad number ** best possible

VantageScore VantageScore is a consumer credit-scoring system in the United States, created through a joint venture of the three major credit bureaus ( Equifax, Experian, and TransUnion). The model is managed and maintained by an independent company, Vantage ...

credit score * 991 = prime number, sum of five consecutive primes (191 + 193 + 197 + 199 + 211), sum of seven consecutive primes (127 + 131 + 137 + 139 + 149 + 151 + 157), Chen prime, lucky prime, prime index prime * 992 = 2⁵ × 31,

, nontotient; number of eleven-dimensional exotic spheres. ** country calling code for Tajikistan * 993 = 3 × 331 ** country calling code for Turkmenistan * 994 = 2 × 7 × 71, sphenic number, nontotient, number of binary words of length 13 with all distinct runs. ** country calling code for Azerbaijan * 995 = 5 × 199 ** country calling code for Georgia ** Singapore fire brigade and emergency ambulance services hotline * 996 = 2² × 3 × 83 ** country calling code for Kyrgyzstan * 997 = largest three-digit prime number, strictly non-palindromic number. It is also a

lucky prime In number theory, a lucky number is a natural number in a set which is generated by a certain "sieve". This sieve is similar to the Sieve of Eratosthenes that generates the primes, but it eliminates numbers based on their position in the remain ...

. * 998 = 2 × 499, nontotient, number of 7-node graphs with two connected components. ** country calling code for Uzbekistan * 999 = 3³ × 37,

Kaprekar number In mathematics, a natural number in a given number base is a p-Kaprekar number if the representation of its square in that base can be split into two parts, where the second part has p digits, that add up to the original number. The numbers are n ...

, Harshad number ** In some parts of the world, such as the UK and Commonwealth countries, 999 (pronounced as 9-9-9) is the

. **

999 999 or triple nine most often refers to: * 999 (emergency telephone number), a telephone number for the emergency services in several countries * 999 (number), an integer * AD 999, a year * 999 BC, a year Books * ''999'' (anthology) or ''999: T ...

was a London

punk Punk or punks may refer to: Genres, subculture, and related aspects * Punk rock, a music genre originating in the 1970s associated with various subgenres * Punk subculture, a subculture associated with punk rock, or aspects of the subculture s ...

band active during the 1970s.

References

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