Compare 61981 vs 61990
| Property | 61981 | 61990 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 619811 | 21 × 51 × 61991 |
| Prime factorization | 61981 | 2 × 5 × 6199 |
| Divisors count | 2 | 8 |
| Divisors | 1, 61981 | 1, 2, 5, 10, 6199, 12398, 30995, 61990 |
| Number of properties | 4 | 0 |
| Primes | 6230th | |
| Pythagorean primes | 3107th | |
| Sexy primes (1st member) | 1675th | |
| Twin primes (2nd member) | 827th | |
| Roman numberals | ||
| Base 2 | 11110010000111012 | 11110010001001102 |
| Base 3 | 100110001213 | 100110002213 |
| Base 4 | 330201314 | 330202124 |
| Base 5 | 34404115 | 34404305 |
| Base 6 | 11545416 | 11545546 |
| Base 7 | 3454637 | 3455057 |
| Base 8 | 1710358 | 1710468 |
| Base 9 | 1040179 | 1040279 |
| Base 10 | 6198110 | 6199010 |
| Base 11 | 4262711 | 4263511 |
| Base 12 | 2ba5112 | 2ba5a12 |
| Base 13 | 2229a13 | 222a613 |
| Base 14 | 1883314 | 1883c14 |
| Base 15 | 1357115 | 1357a15 |
| Base 16 | f21d16 | f22616 |