Compare 1957 vs 1991
| Property | 1957 | 1991 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 191 × 1031 | 111 × 1811 |
| Prime factorization | 19 × 103 | 11 × 181 |
| Divisors count | 4 | 4 |
| Divisors | 1, 19, 103, 1957 | 1, 11, 181, 1991 |
| Number of properties | 1 | 1 |
| Semiprimes | 564th | 576th |
| Roman numberals | MCMLVII | MCMXCI |
| Base 2 | 111101001012 | 111110001112 |
| Base 3 | 22001113 | 22012023 |
| Base 4 | 1322114 | 1330134 |
| Base 5 | 303125 | 304315 |
| Base 6 | 130216 | 131156 |
| Base 7 | 54647 | 55437 |
| Base 8 | 36458 | 37078 |
| Base 9 | 26149 | 26529 |
| Base 10 | 195710 | 199110 |
| Base 11 | 151a11 | 155011 |
| Base 12 | 117112 | 119b12 |
| Base 13 | b7713 | ba213 |
| Base 14 | 9db14 | a2314 |
| Base 15 | 8a715 | 8cb15 |
| Base 16 | 7a516 | 7c716 |