Compare 191231 vs 191999
| Property | 191231 | 191999 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 1912311 | 1919991 |
| Prime factorization | 191231 | 191999 |
| Divisors count | 2 | 2 |
| Divisors | 1, 191231 | 1, 191999 |
| Number of properties | 7 | 5 |
| Additive primes | 6981st | |
| Chen primes | 7286th | |
| Cousin primes (2nd member) | 2049th | |
| Happy primes | 2654th | 2663rd |
| Harmonic primes | 6497th | |
| Isolated primes | 13103rd | 13141st |
| Primes | 17264th | 17326th |
| Sexy primes (1st member) | 4131st | |
| Sophie germain primes | 1981st | |
| Roman numberals | ||
| Base 2 | 1011101010111111112 | 1011101101111111112 |
| Base 3 | 1002010221223 | 1002021010023 |
| Base 4 | 2322233334 | 2323133334 |
| Base 5 | 221044115 | 221204445 |
| Base 6 | 40331556 | 40405156 |
| Base 7 | 14243457 | 14265237 |
| Base 8 | 5653778 | 5667778 |
| Base 9 | 3212789 | 3223329 |
| Base 10 | 19123110 | 19199910 |
| Base 11 | 12074711 | 12128511 |
| Base 12 | 927bb12 | 9313b12 |
| Base 13 | 6907113 | 6951213 |
| Base 14 | 4d99514 | 4dd8314 |
| Base 15 | 3b9db15 | 3bd4e15 |
| Base 16 | 2eaff16 | 2edff16 |