263 (number) explained
263 (two hundred [and] sixty-three) is the natural number between 262 and 264. It is also a prime number.
In mathematics
263 isa balanced prime,[1] an irregular prime,[2] a Ramanujan prime,[3] a Chen prime,[4] anda safe prime.[5]
It is also a strictly non-palindromic number and a happy number.[6]
Notes and References
- Balanced primes.
- Irregular primes.
- Ramanujan primes.
- Web site: Sloane's A109611 : Chen primes. The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. 2016-04-21.
- Safe primes.
- Web site: Sloane's A007770 : Happy numbers. The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. 2016-04-21.