Compare 1985 vs 1991
| Property | 1985 | 1991 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 51 × 3971 | 111 × 1811 |
| Prime factorization | 5 × 397 | 11 × 181 |
| Divisors count | 4 | 4 |
| Divisors | 1, 5, 397, 1985 | 1, 11, 181, 1991 |
| Number of properties | 1 | 1 |
| Semiprimes | 575th | 576th |
| Roman numberals | MCMLXXXV | MCMXCI |
| Base 2 | 111110000012 | 111110001112 |
| Base 3 | 22011123 | 22012023 |
| Base 4 | 1330014 | 1330134 |
| Base 5 | 304205 | 304315 |
| Base 6 | 131056 | 131156 |
| Base 7 | 55347 | 55437 |
| Base 8 | 37018 | 37078 |
| Base 9 | 26459 | 26529 |
| Base 10 | 198510 | 199110 |
| Base 11 | 154511 | 155011 |
| Base 12 | 119512 | 119b12 |
| Base 13 | b9913 | ba213 |
| Base 14 | a1b14 | a2314 |
| Base 15 | 8c515 | 8cb15 |
| Base 16 | 7c116 | 7c716 |