Compare 1900 vs 1909
| Property | 1900 | 1909 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 5 | 2 |
| Prime factorization | 22 × 52 × 191 | 231 × 831 |
| Prime factorization | 2 × 2 × 5 × 5 × 19 | 23 × 83 |
| Divisors count | 18 | 4 |
| Divisors | 1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 190, 380, 475, 950, 1900 | 1, 23, 83, 1909 |
| Number of properties | 0 | 1 |
| Semiprimes | 549th | |
| Roman numberals | MCM | MCMIX |
| Base 2 | 111011011002 | 111011101012 |
| Base 3 | 21211013 | 21212013 |
| Base 4 | 1312304 | 1313114 |
| Base 5 | 301005 | 301145 |
| Base 6 | 124446 | 125016 |
| Base 7 | 53537 | 53657 |
| Base 8 | 35548 | 35658 |
| Base 9 | 25419 | 25519 |
| Base 10 | 190010 | 190910 |
| Base 11 | 147811 | 148611 |
| Base 12 | 112412 | 113112 |
| Base 13 | b3213 | b3b13 |
| Base 14 | 99a14 | 9a514 |
| Base 15 | 86a15 | 87415 |
| Base 16 | 76c16 | 77516 |