Compare 1979 vs 1989
| Property | 1979 | 1989 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 4 |
| Prime factorization | 19791 | 32 × 131 × 171 |
| Prime factorization | 1979 | 3 × 3 × 13 × 17 |
| Divisors count | 2 | 12 |
| Divisors | 1, 1979 | 1, 3, 9, 13, 17, 39, 51, 117, 153, 221, 663, 1989 |
| Number of properties | 6 | 0 |
| Chen primes | 184th | |
| Emirps | 96th | |
| Isolated primes | 180th | |
| Long primes | 116th | |
| Primes | 299th | |
| Sexy primes (2nd member) | 126th | |
| Roman numberals | MCMLXXIX | MCMLXXXIX |
| Base 2 | 111101110112 | 111110001012 |
| Base 3 | 22010223 | 22012003 |
| Base 4 | 1323234 | 1330114 |
| Base 5 | 304045 | 304245 |
| Base 6 | 130556 | 131136 |
| Base 7 | 55257 | 55417 |
| Base 8 | 36738 | 37058 |
| Base 9 | 26389 | 26509 |
| Base 10 | 197910 | 198910 |
| Base 11 | 153a11 | 154911 |
| Base 12 | 118b12 | 119912 |
| Base 13 | b9313 | ba013 |
| Base 14 | a1514 | a2114 |
| Base 15 | 8be15 | 8c915 |
| Base 16 | 7bb16 | 7c516 |