Compare 581 vs 587
| Property | 581 | 587 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 71 × 831 | 5871 |
| Prime factorization | 7 × 83 | 587 |
| Divisors count | 4 | 2 |
| Divisors | 1, 7, 83, 581 | 1, 587 |
| Number of properties | 1 | 8 |
| Chen primes | 77th | |
| Good primes | 32nd | |
| Isolated primes | 56th | |
| Primes | 107th | |
| Safe primes | 20th | |
| Semiprimes | 181st | |
| Sexy primes (1st member) | 52nd | |
| Sexy prime triplets (1st member) | 21st | |
| Super primes | 28th | |
| Roman numberals | DLXXXI | DLXXXVII |
| Base 2 | 10010001012 | 10010010112 |
| Base 3 | 2101123 | 2102023 |
| Base 4 | 210114 | 210234 |
| Base 5 | 43115 | 43225 |
| Base 6 | 24056 | 24156 |
| Base 7 | 14607 | 14667 |
| Base 8 | 11058 | 11138 |
| Base 9 | 7159 | 7229 |
| Base 10 | 58110 | 58710 |
| Base 11 | 48911 | 49411 |
| Base 12 | 40512 | 40b12 |
| Base 13 | 35913 | 36213 |
| Base 14 | 2d714 | 2dd14 |
| Base 15 | 28b15 | 29215 |
| Base 16 | 24516 | 24b16 |