Compare 1639 vs 1645
| Property | 1639 | 1645 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 3 |
| Prime factorization | 111 × 1491 | 51 × 71 × 471 |
| Prime factorization | 11 × 149 | 5 × 7 × 47 |
| Divisors count | 4 | 8 |
| Divisors | 1, 11, 149, 1639 | 1, 5, 7, 35, 47, 235, 329, 1645 |
| Number of properties | 1 | 0 |
| Semiprimes | 469th | |
| Roman numberals | MDCXXXIX | MDCXLV |
| Base 2 | 110011001112 | 110011011012 |
| Base 3 | 20202013 | 20202213 |
| Base 4 | 1212134 | 1212314 |
| Base 5 | 230245 | 230405 |
| Base 6 | 113316 | 113416 |
| Base 7 | 45317 | 45407 |
| Base 8 | 31478 | 31558 |
| Base 9 | 22219 | 22279 |
| Base 10 | 163910 | 164510 |
| Base 11 | 126011 | 126611 |
| Base 12 | b4712 | b5112 |
| Base 13 | 99113 | 99713 |
| Base 14 | 85114 | 85714 |
| Base 15 | 74415 | 74a15 |
| Base 16 | 66716 | 66d16 |