263 (number)
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|---|---|---|---|---|
| Cardinal | two hundred sixty-three | |||
| Ordinal | 263rd (two hundred sixty-third) | |||
| Factorization | prime | |||
| Prime | 56th | |||
| Greek numeral | ΣΞΓ´ | |||
| Roman numeral | CCLXIII, 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.
In mathematics
[edit]263 is a balanced prime,[1] an irregular prime,[2] a Ramanujan prime,[3] a Chen prime,[4] anda safe prime.[5]
263 is also a strictly non-palindromic number and a happy number.[6]
References
[edit]- ↑ 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, N. J. A. (ed.). "Sequence A109611 (Chen primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ 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.
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