Compare 128 vs 139
| Property | 128 | 139 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 1 | 1 |
| Total factors | 7 | 1 |
| Prime factorization | 27 | 1391 |
| Prime factorization | 2 × 2 × 2 × 2 × 2 × 2 × 2 | 139 |
| Divisors count | 8 | 2 |
| Divisors | 1, 2, 4, 8, 16, 32, 64, 128 | 1, 139 |
| Number of properties | 0 | 6 |
| Additive primes | 19th | |
| Chen primes | 28th | |
| Happy primes | 10th | |
| Harmonic primes | 11th | |
| Primes | 34th | |
| Twin primes (2nd member) | 11th | |
| Roman numberals | CXXVIII | CXXXIX |
| Base 2 | 100000002 | 100010112 |
| Base 3 | 112023 | 120113 |
| Base 4 | 20004 | 20234 |
| Base 5 | 10035 | 10245 |
| Base 6 | 3326 | 3516 |
| Base 7 | 2427 | 2567 |
| Base 8 | 2008 | 2138 |
| Base 9 | 1529 | 1649 |
| Base 10 | 12810 | 13910 |
| Base 11 | 10711 | 11711 |
| Base 12 | a812 | b712 |
| Base 13 | 9b13 | a913 |
| Base 14 | 9214 | 9d14 |
| Base 15 | 8815 | 9415 |
| Base 16 | 8016 | 8b16 |