Compare 509 vs 511
| Property | 509 | 511 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 5091 | 71 × 731 |
| Prime factorization | 509 | 7 × 73 |
| Divisors count | 2 | 4 |
| Divisors | 1, 509 | 1, 7, 73, 511 |
| Number of properties | 9 | 1 |
| Chen primes | 69th | |
| Isolated primes | 50th | |
| Long primes | 37th | |
| Primes | 97th | |
| Pythagorean primes | 45th | |
| Semiprimes | 157th | |
| Sexy primes (2nd member) | 47th | |
| Solinas primes | 38th | |
| Sophie germain primes | 26th | |
| Super primes | 25th | |
| Roman numberals | DIX | DXI |
| Base 2 | 1111111012 | 1111111112 |
| Base 3 | 2002123 | 2002213 |
| Base 4 | 133314 | 133334 |
| Base 5 | 40145 | 40215 |
| Base 6 | 22056 | 22116 |
| Base 7 | 13257 | 13307 |
| Base 8 | 7758 | 7778 |
| Base 9 | 6259 | 6279 |
| Base 10 | 50910 | 51110 |
| Base 11 | 42311 | 42511 |
| Base 12 | 36512 | 36712 |
| Base 13 | 30213 | 30413 |
| Base 14 | 28514 | 28714 |
| Base 15 | 23e15 | 24115 |
| Base 16 | 1fd16 | 1ff16 |