Compare 809 vs 819
| Property | 809 | 819 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 4 |
| Prime factorization | 8091 | 32 × 71 × 131 |
| Prime factorization | 809 | 3 × 3 × 7 × 13 |
| Divisors count | 2 | 12 |
| Divisors | 1, 809 | 1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819 |
| Number of properties | 7 | 0 |
| Additive primes | 74th | |
| Chen primes | 95th | |
| Good primes | 39th | |
| Primes | 140th | |
| Pythagorean primes | 68th | |
| Sophie germain primes | 35th | |
| Twin primes (1st member) | 31st | |
| Roman numberals | DCCCIX | DCCCXIX |
| Base 2 | 11001010012 | 11001100112 |
| Base 3 | 10022223 | 10101003 |
| Base 4 | 302214 | 303034 |
| Base 5 | 112145 | 112345 |
| Base 6 | 34256 | 34436 |
| Base 7 | 22347 | 22507 |
| Base 8 | 14518 | 14638 |
| Base 9 | 10889 | 11109 |
| Base 10 | 80910 | 81910 |
| Base 11 | 67611 | 68511 |
| Base 12 | 57512 | 58312 |
| Base 13 | 4a313 | 4b013 |
| Base 14 | 41b14 | 42714 |
| Base 15 | 38e15 | 39915 |
| Base 16 | 32916 | 33316 |