Three hundred sixty-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 ...

following three hundred sixty-eight and preceding three hundred seventy.

In mathematics

369 is the magic constant of the ''9'' × ''9'' magic squareSequence

A006003 A, or a, is the first letter and the first vowel of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''a'' (pronounced ), plural ''aes'' ...

OEIS The On-Line Encyclopedia of Integer Sequences (OEIS) is an online database of integer sequences. It was created and maintained by Neil Sloane while researching at AT&T Labs. He transferred the intellectual property and hosting of the OEIS to the ...

. and the ''n''-Queens Problem for ''n'' = 9. There are 369 free

octomino An octomino (or 8-omino) is a polyomino of order 8, that is, a polygon in the plane made of 8 equal-sized squares connected edge-to-edge. When rotations and reflections are not considered to be distinct shapes, there are 369 different ''free'' ...

es (

polyomino A polyomino is a plane geometric figure formed by joining one or more equal squares edge to edge. It is a polyform whose cells are squares. It may be regarded as a finite subset of the regular square tiling. Polyominoes have been used in pop ...

es of order 8).Sequence

A000105 A, or a, is the first letter and the first vowel of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''a'' (pronounced ), plural ''aes' ...

Other uses

369 is also: * The year 369 or

369 BC __NOTOC__ Year 369 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Tribunate of Fidenas, Cicurinus, Cossus, Cornelius, Cincinnatus and Ambustus (or, less frequently, year 385 ''Ab urbe condita''). T ...

* A

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 ...

gang, also known as

Salakau Salakau ( zh, s=三六九, poj=Saⁿ-la̍k-káu), which means 369 in Hokkien, also known as "Sah Lak Kau", is a street gang or secret society based in Singapore. The numbers 3, 6 and 9 add up to 18, which was the name of an older gang; the nu ...

Hokkien The Hokkien () variety of Chinese is a Southern Min language native to and originating from the Minnan region, where it is widely spoken in the south-eastern part of Fujian in southeastern mainland China. It is one of the national languages ...

* "3-6-9", a song by Cupid featuring B.o.B from '' Time for a Change'' * "369", a song by Buzzcocks

References

{{reflist Integers