Compare 90 vs 99
| Property | 90 | 99 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 3 | 2 |
| Total factors | 4 | 3 |
| Prime factorization | 21 × 32 × 51 | 32 × 111 |
| Prime factorization | 2 × 3 × 3 × 5 | 3 × 3 × 11 |
| Divisors count | 12 | 6 |
| Divisors | 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90 | 1, 3, 9, 11, 33, 99 |
| Number of properties | 0 | 0 |
| Roman numberals | XC | XCIX |
| Base 2 | 10110102 | 11000112 |
| Base 3 | 101003 | 102003 |
| Base 4 | 11224 | 12034 |
| Base 5 | 3305 | 3445 |
| Base 6 | 2306 | 2436 |
| Base 7 | 1567 | 2017 |
| Base 8 | 1328 | 1438 |
| Base 9 | 1109 | 1209 |
| Base 10 | 9010 | 9910 |
| Base 11 | 8211 | 9011 |
| Base 12 | 7612 | 8312 |
| Base 13 | 6c13 | 7813 |
| Base 14 | 6614 | 7114 |
| Base 15 | 6015 | 6915 |
| Base 16 | 5a16 | 6316 |