Compare 71981 vs 71987
| Property | 71981 | 71987 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 72 × 131 × 1131 | 719871 |
| Prime factorization | 7 × 7 × 13 × 113 | 71987 |
| Divisors count | 12 | 2 |
| Divisors | 1, 7, 13, 49, 91, 113, 637, 791, 1469, 5537, 10283, 71981 | 1, 71987 |
| Number of properties | 0 | 7 |
| Chen primes | 3250th | |
| Cousin primes (2nd member) | 923rd | |
| Isolated primes | 5265th | |
| Primes | 7126th | |
| Safe primes | 510th | |
| Sexy primes (1st member) | 1871st | |
| Sexy prime triplets (1st member) | 421st | |
| Roman numberals | ||
| Base 2 | 100011001001011012 | 100011001001100112 |
| Base 3 | 101222012223 | 101222020123 |
| Base 4 | 1012102314 | 1012103034 |
| Base 5 | 43004115 | 43004225 |
| Base 6 | 13131256 | 13131356 |
| Base 7 | 4166007 | 4166067 |
| Base 8 | 2144558 | 2144638 |
| Base 9 | 1186589 | 1186659 |
| Base 10 | 7198110 | 7198710 |
| Base 11 | 4a09811 | 4a0a311 |
| Base 12 | 357a512 | 357ab12 |
| Base 13 | 269c013 | 269c613 |
| Base 14 | 1c33714 | 1c33d14 |
| Base 15 | 164db15 | 164e215 |
| Base 16 | 1192d16 | 1193316 |