Compare 61 vs 139
| Property | 61 | 139 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 611 | 1391 |
| Prime factorization | 61 | 139 |
| Divisors count | 2 | 2 |
| Divisors | 1, 61 | 1, 139 |
| Number of properties | 12 | 6 |
| Additive primes | 11th | 19th |
| Centered decagonal primes | 3rd | |
| Centered square primes | 4th | |
| Chen primes | 28th | |
| Cuban primes 1 | 4th | |
| Happy primes | 10th | |
| Harmonic primes | 11th | |
| Long primes | 8th | |
| Primes | 18th | 34th |
| Pythagorean primes | 8th | |
| Sexy primes (1st member) | 12th | |
| Sexy prime quadrupletss (1st member) | 4th | |
| Sexy prime triplets (1st member) | 8th | |
| Solinas primes | 15th | |
| Twin primes (2nd member) | 7th | 11th |
| Roman numberals | LXI | CXXXIX |
| Base 2 | 1111012 | 100010112 |
| Base 3 | 20213 | 120113 |
| Base 4 | 3314 | 20234 |
| Base 5 | 2215 | 10245 |
| Base 6 | 1416 | 3516 |
| Base 7 | 1157 | 2567 |
| Base 8 | 758 | 2138 |
| Base 9 | 679 | 1649 |
| Base 10 | 6110 | 13910 |
| Base 11 | 5611 | 11711 |
| Base 12 | 5112 | b712 |
| Base 13 | 4913 | a913 |
| Base 14 | 4514 | 9d14 |
| Base 15 | 4115 | 9415 |
| Base 16 | 3d16 | 8b16 |