Compare 809 vs 813
| Property | 809 | 813 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 8091 | 31 × 2711 |
| Prime factorization | 809 | 3 × 271 |
| Divisors count | 2 | 4 |
| Divisors | 1, 809 | 1, 3, 271, 813 |
| Number of properties | 7 | 1 |
| Additive primes | 74th | |
| Chen primes | 95th | |
| Good primes | 39th | |
| Primes | 140th | |
| Pythagorean primes | 68th | |
| Semiprimes | 246th | |
| Sophie germain primes | 35th | |
| Twin primes (1st member) | 31st | |
| Roman numberals | DCCCIX | DCCCXIII |
| Base 2 | 11001010012 | 11001011012 |
| Base 3 | 10022223 | 10100103 |
| Base 4 | 302214 | 302314 |
| Base 5 | 112145 | 112235 |
| Base 6 | 34256 | 34336 |
| Base 7 | 22347 | 22417 |
| Base 8 | 14518 | 14558 |
| Base 9 | 10889 | 11039 |
| Base 10 | 80910 | 81310 |
| Base 11 | 67611 | 67a11 |
| Base 12 | 57512 | 57912 |
| Base 13 | 4a313 | 4a713 |
| Base 14 | 41b14 | 42114 |
| Base 15 | 38e15 | 39315 |
| Base 16 | 32916 | 32d16 |