Compare 809 vs 818
| Property | 809 | 818 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 8091 | 21 × 4091 |
| Prime factorization | 809 | 2 × 409 |
| Divisors count | 2 | 4 |
| Divisors | 1, 809 | 1, 2, 409, 818 |
| Number of properties | 7 | 1 |
| Additive primes | 74th | |
| Chen primes | 95th | |
| Good primes | 39th | |
| Primes | 140th | |
| Pythagorean primes | 68th | |
| Semiprimes | 249th | |
| Sophie germain primes | 35th | |
| Twin primes (1st member) | 31st | |
| Roman numberals | DCCCIX | DCCCXVIII |
| Base 2 | 11001010012 | 11001100102 |
| Base 3 | 10022223 | 10100223 |
| Base 4 | 302214 | 303024 |
| Base 5 | 112145 | 112335 |
| Base 6 | 34256 | 34426 |
| Base 7 | 22347 | 22467 |
| Base 8 | 14518 | 14628 |
| Base 9 | 10889 | 11089 |
| Base 10 | 80910 | 81810 |
| Base 11 | 67611 | 68411 |
| Base 12 | 57512 | 58212 |
| Base 13 | 4a313 | 4ac13 |
| Base 14 | 41b14 | 42614 |
| Base 15 | 38e15 | 39815 |
| Base 16 | 32916 | 33216 |