Compare 1 vs 9
| Property | 1 | 9 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 0 | 1 |
| Total factors | 0 | 2 |
| Prime factorization | 32 | |
| Prime factorization | 3 × 3 | |
| Divisors count | 1 | 3 |
| Divisors | 1 | 1, 3, 9 |
| Number of properties | 0 | 1 |
| Semiprimes | 3rd | |
| Roman numberals | I | IX |
| Base 2 | 12 | 10012 |
| Base 3 | 13 | 1003 |
| Base 4 | 14 | 214 |
| Base 5 | 15 | 145 |
| Base 6 | 16 | 136 |
| Base 7 | 17 | 127 |
| Base 8 | 18 | 118 |
| Base 9 | 19 | 109 |
| Base 10 | 110 | 910 |
| Base 11 | 111 | 911 |
| Base 12 | 112 | 912 |
| Base 13 | 113 | 913 |
| Base 14 | 114 | 914 |
| Base 15 | 115 | 915 |
| Base 16 | 116 | 916 |