269 (number)

← 268 269 270 →
← 200 210 220 230 240 250 260 270 280 290 → List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	two hundred sixty-nine
Ordinal	269th (two hundred and sixty-ninth)
Factorization	269
Prime	yes
Roman numeral	CCLXIX
Binary	1000011012
Ternary	1002223
Quaternary	100314
Quinary	20345
Senary	11256
Octal	4158
Duodecimal	1A512
Hexadecimal	10D16
Vigesimal	D920
Base 36	7H36

269 (two hundred [and] sixty-nine) is the natural number between 268 and 270. It is also a prime number.

In mathematics

269 is a twin prime,^[1] and a Ramanujan prime.^[2] It is the largest prime factor of 9! + 1 = 362881,^[3] and the smallest natural number that cannot be represented as the determinant of a 10 × 10 (0,1)-matrix.^[4]

See also

• Area code 269
• Calf 269 animal liberation movement
• Hawkmoon 269 pop song by U2
• List of highways numbered 269

References

1. "Sloane's A001359 : Lesser of twin primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
2. "Sloane's A104272 : Ramanujan primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
3. "Sloane's A002583 : Largest prime factor of n! + 1". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
4. "Sloane's A013588 : Smallest positive integer not the determinant of an n X n 0-1 matrix". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.