369 (number)

← 368 369 370 →
List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	three hundred sixty-nine
Ordinal	369th (three hundred and sixty-ninth)
Factorization	3^2× 41
Divisors	1, 3, 9, 41, 123, 369 kkk
Roman numeral	CCCLXIX
Binary	1011100012
Ternary	1112003
Quaternary	113014
Quinary	24345
Senary	14136
Octal	5618
Duodecimal	26912
Hexadecimal	17116
Vigesimal	I920
Base 36	A936

Three hundred sixty-nine is the natural number following three hundred sixty-eight and preceding three hundred seventy.

In mathematics

369 is the magic constant of the 9 × 9 magic square^[1][2] and the n-Queens Problem for n = 9.^[2]

There are 369 free octominoes (polyominoes of order 8).^[3][4]

In other fields

369 is also:

• The year 369 or 369 BC
• A Singapore gang, also known as Salakau in Hokkien

References

1. Kraitchik, M (1942). "Magic Squares". Mathematical Recreations. New York: Norton. pp. 142–192.
2. Sequence A006003 in OEIS.
3. Redelmeier, D. Hugh (1981). "Counting polyominoes: yet another attack". Discrete Mathematics 36: 191–203. doi:10.1016/0012-365X(81)90237-5.
4. Sequence A000105 in OEIS.