Compare 1639 vs 1651
| Property | 1639 | 1651 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 111 × 1491 | 131 × 1271 |
| Prime factorization | 11 × 149 | 13 × 127 |
| Divisors count | 4 | 4 |
| Divisors | 1, 11, 149, 1639 | 1, 13, 127, 1651 |
| Number of properties | 1 | 1 |
| Semiprimes | 469th | 475th |
| Roman numberals | MDCXXXIX | MDCLI |
| Base 2 | 110011001112 | 110011100112 |
| Base 3 | 20202013 | 20210113 |
| Base 4 | 1212134 | 1213034 |
| Base 5 | 230245 | 231015 |
| Base 6 | 113316 | 113516 |
| Base 7 | 45317 | 45467 |
| Base 8 | 31478 | 31638 |
| Base 9 | 22219 | 22349 |
| Base 10 | 163910 | 165110 |
| Base 11 | 126011 | 127111 |
| Base 12 | b4712 | b5712 |
| Base 13 | 99113 | 9a013 |
| Base 14 | 85114 | 85d14 |
| Base 15 | 74415 | 75115 |
| Base 16 | 66716 | 67316 |