Compare 501 vs 509
| Property | 501 | 509 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 1671 | 5091 |
| Prime factorization | 3 × 167 | 509 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 167, 501 | 1, 509 |
| Number of properties | 1 | 9 |
| Chen primes | 69th | |
| Isolated primes | 50th | |
| Long primes | 37th | |
| Primes | 97th | |
| Pythagorean primes | 45th | |
| Semiprimes | 154th | |
| Sexy primes (2nd member) | 47th | |
| Solinas primes | 38th | |
| Sophie germain primes | 26th | |
| Super primes | 25th | |
| Roman numberals | DI | DIX |
| Base 2 | 1111101012 | 1111111012 |
| Base 3 | 2001203 | 2002123 |
| Base 4 | 133114 | 133314 |
| Base 5 | 40015 | 40145 |
| Base 6 | 21536 | 22056 |
| Base 7 | 13147 | 13257 |
| Base 8 | 7658 | 7758 |
| Base 9 | 6169 | 6259 |
| Base 10 | 50110 | 50910 |
| Base 11 | 41611 | 42311 |
| Base 12 | 35912 | 36512 |
| Base 13 | 2c713 | 30213 |
| Base 14 | 27b14 | 28514 |
| Base 15 | 23615 | 23e15 |
| Base 16 | 1f516 | 1fd16 |