| ||||
---|---|---|---|---|
Cardinal | two hundred sixty-three | |||
Ordinal | 263rd (two hundred sixty-third) | |||
Factorization | prime | |||
Prime | 56th | |||
Greek numeral | ΣΞΓ´ | |||
Roman numeral | CCLXIII | |||
Binary | 1000001112 | |||
Ternary | 1002023 | |||
Senary | 11156 | |||
Octal | 4078 | |||
Duodecimal | 19B12 | |||
Hexadecimal | 10716 |
263 (two hundred [and] sixty-three) is the natural number between 262 and 264. It is also a prime number.
In mathematics
263 is a balanced prime,[1] an irregular prime,[2] a Ramanujan prime,[3] a Chen prime,[4] and a safe prime.[5]
It is also a strictly non-palindromic number and a happy number.[6]
References
- ^ Sloane, N. J. A. (ed.). "Sequence A006562 (Balanced primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ Sloane, N. J. A. (ed.). "Sequence A000928 (Irregular primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ Sloane, N. J. A. (ed.). "Sequence A104272 (Ramanujan primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ "Sloane's A109611 : Chen primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-04-21.
- ^ Sloane, N. J. A. (ed.). "Sequence A005385 (Safe primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ "Sloane's A007770 : Happy numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-04-21.