Compare 1209 vs 1213
| Property | 1209 | 1213 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 31 × 131 × 311 | 12131 |
| Prime factorization | 3 × 13 × 31 | 1213 |
| Divisors count | 8 | 2 |
| Divisors | 1, 3, 13, 31, 39, 93, 403, 1209 | 1, 1213 |
| Number of properties | 0 | 7 |
| Additive primes | 106th | |
| Cousin primes (1st member) | 45th | |
| Emirps | 52nd | |
| Good primes | 49th | |
| Isolated primes | 117th | |
| Primes | 198th | |
| Pythagorean primes | 97th | |
| Roman numberals | MCCIX | MCCXIII |
| Base 2 | 100101110012 | 100101111012 |
| Base 3 | 11222103 | 11222213 |
| Base 4 | 1023214 | 1023314 |
| Base 5 | 143145 | 143235 |
| Base 6 | 53336 | 53416 |
| Base 7 | 33457 | 33527 |
| Base 8 | 22718 | 22758 |
| Base 9 | 15839 | 15879 |
| Base 10 | 120910 | 121310 |
| Base 11 | 9aa11 | a0311 |
| Base 12 | 84912 | 85112 |
| Base 13 | 72013 | 72413 |
| Base 14 | 62514 | 62914 |
| Base 15 | 55915 | 55d15 |
| Base 16 | 4b916 | 4bd16 |