Compare 991 vs 994
| Property | 991 | 994 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 9911 | 21 × 71 × 711 |
| Prime factorization | 991 | 2 × 7 × 71 |
| Divisors count | 2 | 8 |
| Divisors | 1, 991 | 1, 2, 7, 14, 71, 142, 497, 994 |
| Number of properties | 10 | 0 |
| Additive primes | 89th | |
| Chen primes | 115th | |
| Emirps | 36th | |
| Isolated primes | 98th | |
| Lucky primes | 42nd | |
| Primes | 167th | |
| Sexy primes (1st member) | 74th | |
| Solinas primes | 43rd | |
| Super primes | 39th | |
| Ulam primes | 18th | |
| Roman numberals | CMXCI | CMXCIV |
| Base 2 | 11110111112 | 11111000102 |
| Base 3 | 11002013 | 11002113 |
| Base 4 | 331334 | 332024 |
| Base 5 | 124315 | 124345 |
| Base 6 | 43316 | 43346 |
| Base 7 | 26147 | 26207 |
| Base 8 | 17378 | 17428 |
| Base 9 | 13219 | 13249 |
| Base 10 | 99110 | 99410 |
| Base 11 | 82111 | 82411 |
| Base 12 | 6a712 | 6aa12 |
| Base 13 | 5b313 | 5b613 |
| Base 14 | 50b14 | 51014 |
| Base 15 | 46115 | 46415 |
| Base 16 | 3df16 | 3e216 |