Compare 991987 vs 991999
| Property | 991987 | 991999 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 9919871 | 9919991 |
| Prime factorization | 991987 | 991999 |
| Divisors count | 2 | 2 |
| Divisors | 1, 991987 | 1, 991999 |
| Number of properties | 4 | 4 |
| Additive primes | 29906th | |
| Emirps | 10999th | |
| Isolated primes | 61701st | 61702nd |
| Lucky primes | 8558th | |
| Primes | 77926th | 77927th |
| Sexy primes (2nd member) | 16280th | |
| Roman numberals | ||
| Base 2 | 111100100010111100112 | 111100100010111111112 |
| Base 3 | 12121012020213 | 12121012022013 |
| Base 4 | 33020233034 | 33020233334 |
| Base 5 | 2232204225 | 2232204445 |
| Base 6 | 331323116 | 331323316 |
| Base 7 | 113010437 | 113010617 |
| Base 8 | 36213638 | 36213778 |
| Base 9 | 17716679 | 17716819 |
| Base 10 | 99198710 | 99199910 |
| Base 11 | 61832711 | 61833811 |
| Base 12 | 3ba09712 | 3ba0a712 |
| Base 13 | 28969913 | 2896a813 |
| Base 14 | 1bb72314 | 1bb73114 |
| Base 15 | 148dc715 | 148dd415 |
| Base 16 | f22f316 | f22ff16 |