Compare 991987 vs 991993
| Property | 991987 | 991993 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 9919871 | 1031 × 96311 |
| Prime factorization | 991987 | 103 × 9631 |
| Divisors count | 2 | 4 |
| Divisors | 1, 991987 | 1, 103, 9631, 991993 |
| Number of properties | 4 | 1 |
| Additive primes | 29906th | |
| Isolated primes | 61701st | |
| Primes | 77926th | |
| Semiprimes | 208440th | |
| Sexy primes (2nd member) | 16280th | |
| Roman numberals | ||
| Base 2 | 111100100010111100112 | 111100100010111110012 |
| Base 3 | 12121012020213 | 12121012021113 |
| Base 4 | 33020233034 | 33020233214 |
| Base 5 | 2232204225 | 2232204335 |
| Base 6 | 331323116 | 331323216 |
| Base 7 | 113010437 | 113010527 |
| Base 8 | 36213638 | 36213718 |
| Base 9 | 17716679 | 17716749 |
| Base 10 | 99198710 | 99199310 |
| Base 11 | 61832711 | 61833211 |
| Base 12 | 3ba09712 | 3ba0a112 |
| Base 13 | 28969913 | 2896a213 |
| Base 14 | 1bb72314 | 1bb72914 |
| Base 15 | 148dc715 | 148dcd15 |
| Base 16 | f22f316 | f22f916 |