73 (number)
| ||||
|---|---|---|---|---|
| Cardinal | seventy-three | |||
| Ordinal | 73rd (seventy-third) | |||
| Factorization | prime | |||
| Prime | 21st | |||
| Divisors | 1, 73 | |||
| Greek numeral | ΟΓ´ | |||
| Roman numeral | LXXIII, lxxiii | |||
| Binary | 10010012 | |||
| Ternary | 22013 | |||
| Senary | 2016 | |||
| Octal | 1118 | |||
| Duodecimal | 6112 | |||
| Hexadecimal | 4916 | |||
73 (seventy-three) is the natural number following 72 and preceding 74. In English, it is the smallest natural number with twelve letters in its spelled out name.
It is the 21st prime number and the fourth star number. It is also the eighth twin prime, with 71.