Compare 989 vs 990
| Property | 989 | 990 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 4 |
| Total factors | 2 | 5 |
| Prime factorization | 231 × 431 | 21 × 32 × 51 × 111 |
| Prime factorization | 23 × 43 | 2 × 3 × 3 × 5 × 11 |
| Divisors count | 4 | 24 |
| Divisors | 1, 23, 43, 989 | 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990 |
| Number of properties | 1 | 0 |
| Semiprimes | 296th | |
| Roman numberals | CMLXXXIX | CMXC |
| Base 2 | 11110111012 | 11110111102 |
| Base 3 | 11001223 | 11002003 |
| Base 4 | 331314 | 331324 |
| Base 5 | 124245 | 124305 |
| Base 6 | 43256 | 43306 |
| Base 7 | 26127 | 26137 |
| Base 8 | 17358 | 17368 |
| Base 9 | 13189 | 13209 |
| Base 10 | 98910 | 99010 |
| Base 11 | 81a11 | 82011 |
| Base 12 | 6a512 | 6a612 |
| Base 13 | 5b113 | 5b213 |
| Base 14 | 50914 | 50a14 |
| Base 15 | 45e15 | 46015 |
| Base 16 | 3dd16 | 3de16 |