Compare 990909 vs 990917
| Property | 990909 | 990917 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 32 × 231 × 47871 | 9909171 |
| Prime factorization | 3 × 3 × 23 × 4787 | 990917 |
| Divisors count | 12 | 2 |
| Divisors | 1, 3, 9, 23, 69, 207, 4787, 14361, 43083, 110101, 330303, 990909 | 1, 990917 |
| Number of properties | 0 | 4 |
| Chen primes | 29725th | |
| Isolated primes | 61627th | |
| Primes | 77842nd | |
| Sexy primes (1st member) | 16259th | |
| Roman numberals | ||
| Base 2 | 111100011110101111012 | 111100011110110001012 |
| Base 3 | 12121000211003 | 12121000211223 |
| Base 4 | 33013223314 | 33013230114 |
| Base 5 | 2232021145 | 2232021325 |
| Base 6 | 331233136 | 331233256 |
| Base 7 | 112646437 | 112646547 |
| Base 8 | 36172758 | 36173058 |
| Base 9 | 17702409 | 17702489 |
| Base 10 | 99090910 | 99091710 |
| Base 11 | 61753711 | 61754411 |
| Base 12 | 3b953912 | 3b954512 |
| Base 13 | 28904a13 | 28905513 |
| Base 14 | 1bb19314 | 1bb19b14 |
| Base 15 | 14890915 | 14891215 |
| Base 16 | f1ebd16 | f1ec516 |