49 (forty-nine) 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 n ...

following 48 and preceding 50.

In mathematics

Forty-nine is the square of

seven 7 is a number, numeral, and glyph. 7 or seven may also refer to: * AD 7, the seventh year of the AD era * 7 BC, the seventh year before the AD era * The month of July Music Artists * Seven (Swiss singer) (born 1978), a Swiss recording artist ...

. It appears in the

Padovan sequence In number theory, the Padovan sequence is the sequence of integers ''P''(''n'') defined. by the initial values :P(0)=P(1)=P(2)=1, and the recurrence relation :P(n)=P(n-2)+P(n-3). The first few values of ''P''(''n'') are :1, 1, 1, 2, 2, 3, 4, 5 ...

, preceded by the terms 21, 28, 37 (it is the sum of the first two of these). Along with the number that immediately derives from it, 77, the only number under

100 100 or one hundred (Roman numeral: C) is the natural number following 99 and preceding 101. In medieval contexts, it may be described as the short hundred or five score in order to differentiate the English and Germanic use of "hundred" to de ...

not having its

home prime In number theory, the home prime HP(''n'') of an integer ''n'' greater than 1 is the prime number obtained by repeatedly factoring the increasing concatenation of prime factors including repetitions. The ''m''th intermediate stage in the process o ...

known ().

Decimal representation

The sum of the digits of the square of 49 (2401) is the square root of 49. 49 is the first square where the digits are squares. In this case, 4 and 9 are squares.

Reciprocal

The fraction is a repeating decimal with a period of 42: : = (42 digits repeat) There are 42 (note that this number is the period) positive integers that are less than 49 and coprime to 49. Multiplying 020408163265306122448979591836734693877551 by each of these integers results in a cyclic permutation of the original number: *020408163265306122448979591836734693877551 × 2 = 040816326530612244897959183673469387755102 *020408163265306122448979591836734693877551 × 3 = 061224489795918367346938775510204081632653 *020408163265306122448979591836734693877551 × 4 = 081632653061224489795918367346938775510204 *... The repeating number can be obtained from 02 and repetition of doubles placed at two places to the right: 02 04 08 16 32 64 128 256 512 1024 2048 + ... ---------------------- 020408163265306122448979591836734693877551...0204081632... because satisfies: :

x = \frac + \frac = \frac(1 + x)\, .

In chemistry

* The

atomic number The atomic number or nuclear charge number (symbol ''Z'') of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei, this is equal to the proton number (''n''p) or the number of protons found in the nucleus of every ...

of indium. * During the

Manhattan Project The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons. It was led by the United States with the support of the United Kingdom and Canada. From 1942 to 1946, the project w ...

plutonium Plutonium is a radioactive chemical element with the symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. The element normally exhibi ...

was also often referred to, simply, as "49". Number 4 was for the last digit in 94 (atomic number of plutonium) and 9 for the last digit in Pu-239, the weapon-grade fissile isotope used in nuclear bombs.

In astronomy

* Messier object M49, a magnitude 10.0

galaxy A galaxy is a system of stars, stellar remnants, interstellar gas, dust, dark matter, bound together by gravity. The word is derived from the Greek ' (), literally 'milky', a reference to the Milky Way galaxy that contains the Solar System. ...

in the

constellation A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object. The origins of the e ...

Virgo. * The

New General Catalogue The ''New General Catalogue of Nebulae and Clusters of Stars'' (abbreviated NGC) is an astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects, including galaxies, star clusters and ...

br>object
NGC 49, a

spiral galaxy Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work ''The Realm of the Nebulae''Cetus.

In religion

* In

Judaism Judaism ( he, ''Yahăḏūṯ'') is an Abrahamic, monotheistic, and ethnic religion comprising the collective religious, cultural, and legal tradition and civilization of the Jewish people. It has its roots as an organized religion in the ...

, the number of days of the

Counting of the Omer Counting of the Omer (, Sefirat HaOmer, sometimes abbreviated as Sefira or the Omer) is an important verbal counting of each of the forty-nine days starting with the Wave Offering of a sheaf of ripe grain with a sacrifice immediately following ...

* The number of days and night

Siddhartha Gautama Siddhartha Gautama, most commonly referred to as the Buddha, was a wandering ascetic and religious teacher who lived in South Asia during the 6th or 5th century BCE and founded Buddhism. According to Buddhist tradition, he was born in Lu ...

spent meditating as a holy man * In

Buddhism Buddhism ( , ), also known as Buddha Dharma and Dharmavinaya (), is an Indian religion or philosophical tradition based on teachings attributed to the Buddha. It originated in northern India as a -movement in the 5th century BCE, and gra ...

, 49 days is one of the lengths of the intermediate state ( bardo)

In sports

* ''49er'', a member of the

San Francisco 49ers The San Francisco 49ers (also written as the San Francisco Forty-Niners) are a professional American football team based in the San Francisco Bay Area. The 49ers compete in the National Football League (NFL) as a member of the league's National ...

team of the

National Football League The National Football League (NFL) is a professional American football league that consists of 32 teams, divided equally between the American Football Conference (AFC) and the National Football Conference (NFC). The NFL is one of the ...

( United States football). *

Arsenal An arsenal is a place where arms and ammunition are made, maintained and repaired, stored, or issued, in any combination, whether privately or publicly owned. Arsenal and armoury (British English) or armory (American English) are mostly ...

had a 49-game unbeaten run between May 2003 and October 2004 until they lost to

Manchester United Manchester () is a city in Greater Manchester, England. It had a population of 552,000 in 2021. It is bordered by the Cheshire Plain to the south, the Pennines to the north and east, and the neighbouring city of City of Salford, Salford to ...

, which is a national record in English football. * Rocky Marciano ended his

boxing Boxing (also known as "Western boxing" or "pugilism") is a combat sport in which two people, usually wearing protective gloves and other protective equipment such as hand wraps and mouthguards, throw punches at each other for a predetermined ...

career as the only heavyweight champion with a perfect record—49 wins in 49 professional bouts, with 43 knockouts. * Indian Premier League

cricket Cricket is a bat-and-ball game played between two teams of eleven players on a field at the centre of which is a pitch with a wicket at each end, each comprising two bails balanced on three stumps. The batting side scores runs by striki ...

team

Royal Challengers Bangalore Royal Challengers Bangalore (often abbreviated as RCB) are a franchise cricket team based in Bangalore, Karnataka, that plays in the Indian Premier League (IPL). It was founded in 2008 by United Spirits and named after the company's liquor b ...

holds the lowest ever team total in IPL history in the 2017 edition of IPL

In music

* "49 Bye-Byes", a song on the self-titled album '' Crosby Stills and Nash'' * "Days of '49", a 19th century folk song about the

California Gold Rush The California Gold Rush (1848–1855) was a gold rush that began on January 24, 1848, when gold was found by James W. Marshall at Sutter's Mill in Coloma, California. The news of gold brought approximately 300,000 people to California fro ...

, recorded by Bob Dylan (on the album ''

Self Portrait A self-portrait is a representation of an artist that is drawn, painted, photographed, or sculpted by that artist. Although self-portraits have been made since the earliest times, it is not until the Early Renaissance in the mid-15th century tha ...

'') and by many others * '' 49:00... Of Your Time/Life'' is a one-track solo album by Paul Westerberg. * In

Blues music Blues is a music genre and musical form which originated in the Deep South of the United States around the 1860s. Blues incorporated spirituals, work songs, field hollers, shouts, chants, and rhymed simple narrative ballads from the Afr ...

lore, it was at the junction of US Highway 49 and 61 in

Clarksdale, Mississippi Clarksdale is a city in and the county seat of Coahoma County, Mississippi, United States. It is located along the Sunflower River. Clarksdale is named after John Clark, a settler who founded the city in the mid-19th century when he establishe ...

, that legendary bluesman Robert Johnson sold his soul to the devil in return for fame and success. In later years Howlin' Wolf immortalized the road in the song “Highway 49”, originally written by

Big Joe Williams Joseph Lee "Big Joe" Williams (October 16, 1903 – December 17, 1982) was an American Delta blues guitarist, singer and songwriter, notable for the distinctive sound of his nine-string guitar. Performing over five decades, he recorded the s ...

In other fields

Forty-nine is: *

HP-49 series The HP 49/50 series are Hewlett-Packard (HP) manufactured graphing calculators. They are the successors of the popular HP 48 series. There are five calculators in the 49/50 series of HP graphing calculators. These calculators have both al ...

is a

Hewlett Packard The Hewlett-Packard Company, commonly shortened to Hewlett-Packard ( ) or HP, was an American multinational information technology company headquartered in Palo Alto, California. HP developed and provided a wide variety of hardware components ...

calculator An electronic calculator is typically a portable electronic device used to perform calculations, ranging from basic arithmetic to complex mathematics. The first solid-state electronic calculator was created in the early 1960s. Pocket-sized ...

* ''49er'', one who participated in the 1849

. * The code for international direct dial phone calls to

Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...

* In the title of Thomas Pynchon's novel '' The Crying of Lot 49'' * In the title of the movies ''

Ladder 49 ''Ladder 49'' is a 2004 American disaster thriller film directed by Jay Russell and written by Lewis Colick. The film follows Baltimore firefighter Jack Morrison, who is trapped inside a warehouse fire, and his recollection of the events that got ...

'' and ''

49 Up The ''Up'' series of documentary films follows the lives of ten males and four females in England beginning in 1964, when they were seven years old. The first film was titled ''Seven Up!'', with later films adjusting the number in the title t ...

'' * A 49 is a party after a

powwow A powwow (also pow wow or pow-wow) is a gathering with dances held by many Native American and First Nations communities. Powwows today allow Indigenous people to socialize, dance, sing, and honor their cultures. Powwows may be private or pu ...

or any gathering of American Indians, held by the participants. It is also type of song that is sung on such occasions. A 49 is typically held in an isolated place and features drumming and singing. * 49th parallel between Canada and the USA *

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

ese GS1 country code * The number of the French department

Maine-et-Loire Maine-et-Loire () is a department in the Loire Valley in the Pays de la Loire region in Western France. It is named after the two rivers, Maine and the Loire. It borders Mayenne and Sarthe to the north, Loire-Atlantique to the west, Indre-e ...

References

{{DEFAULTSORT:49 (Number) Integers