Compare 1985 vs 1990
| Property | 1985 | 1990 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 3 |
| Prime factorization | 51 × 3971 | 21 × 51 × 1991 |
| Prime factorization | 5 × 397 | 2 × 5 × 199 |
| Divisors count | 4 | 8 |
| Divisors | 1, 5, 397, 1985 | 1, 2, 5, 10, 199, 398, 995, 1990 |
| Number of properties | 1 | 0 |
| Semiprimes | 575th | |
| Roman numberals | MCMLXXXV | MCMXC |
| Base 2 | 111110000012 | 111110001102 |
| Base 3 | 22011123 | 22012013 |
| Base 4 | 1330014 | 1330124 |
| Base 5 | 304205 | 304305 |
| Base 6 | 131056 | 131146 |
| Base 7 | 55347 | 55427 |
| Base 8 | 37018 | 37068 |
| Base 9 | 26459 | 26519 |
| Base 10 | 198510 | 199010 |
| Base 11 | 154511 | 154a11 |
| Base 12 | 119512 | 119a12 |
| Base 13 | b9913 | ba113 |
| Base 14 | a1b14 | a2214 |
| Base 15 | 8c515 | 8ca15 |
| Base 16 | 7c116 | 7c616 |