Compare 1904 vs 1909
| Property | 1904 | 1909 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 6 | 2 |
| Prime factorization | 24 × 71 × 171 | 231 × 831 |
| Prime factorization | 2 × 2 × 2 × 2 × 7 × 17 | 23 × 83 |
| Divisors count | 20 | 4 |
| Divisors | 1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 56, 68, 112, 119, 136, 238, 272, 476, 952, 1904 | 1, 23, 83, 1909 |
| Number of properties | 0 | 1 |
| Semiprimes | 549th | |
| Roman numberals | MCMIV | MCMIX |
| Base 2 | 111011100002 | 111011101012 |
| Base 3 | 21211123 | 21212013 |
| Base 4 | 1313004 | 1313114 |
| Base 5 | 301045 | 301145 |
| Base 6 | 124526 | 125016 |
| Base 7 | 53607 | 53657 |
| Base 8 | 35608 | 35658 |
| Base 9 | 25459 | 25519 |
| Base 10 | 190410 | 190910 |
| Base 11 | 148111 | 148611 |
| Base 12 | 112812 | 113112 |
| Base 13 | b3613 | b3b13 |
| Base 14 | 9a014 | 9a514 |
| Base 15 | 86e15 | 87415 |
| Base 16 | 77016 | 77516 |