263 (number)


263 is the natural number between 262 and 264. It is also a honaker prime number.

In mathematics

263 is the smallest prime number in base 10 whose expansion in any smaller base is never prime when interpreted in base 10:
BaseExpansion of 263Factorisation of expansion in base 10
21000001112467 × 214133
310020232 × 50101
410013417 × 19 × 31
5202357 × 17 × 17
6111565 × 223
752472 × 2 × 131
8407811 × 37
932292 × 7 × 23

It is also:
It is also a strictly non-palindromic number and a happy number.