Compare 1637 vs 1639
| Property | 1637 | 1639 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 16371 | 111 × 1491 |
| Prime factorization | 1637 | 11 × 149 |
| Divisors count | 2 | 4 |
| Divisors | 1, 1637 | 1, 11, 149, 1639 |
| Number of properties | 5 | 1 |
| Additive primes | 138th | |
| Chen primes | 164th | |
| Isolated primes | 156th | |
| Primes | 259th | |
| Pythagorean primes | 124th | |
| Semiprimes | 469th | |
| Roman numberals | MDCXXXVII | MDCXXXIX |
| Base 2 | 110011001012 | 110011001112 |
| Base 3 | 20201223 | 20202013 |
| Base 4 | 1212114 | 1212134 |
| Base 5 | 230225 | 230245 |
| Base 6 | 113256 | 113316 |
| Base 7 | 45267 | 45317 |
| Base 8 | 31458 | 31478 |
| Base 9 | 22189 | 22219 |
| Base 10 | 163710 | 163910 |
| Base 11 | 125911 | 126011 |
| Base 12 | b4512 | b4712 |
| Base 13 | 98c13 | 99113 |
| Base 14 | 84d14 | 85114 |
| Base 15 | 74215 | 74415 |
| Base 16 | 66516 | 66716 |