Compare 991 vs 1249
| Property | 991 | 1249 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 9911 | 12491 |
| Prime factorization | 991 | 1249 |
| Divisors count | 2 | 2 |
| Divisors | 1, 991 | 1, 1249 |
| Number of properties | 10 | 5 |
| Additive primes | 89th | |
| Chen primes | 115th | |
| Emirps | 36th | 58th |
| Isolated primes | 98th | 121st |
| Lucky primes | 42nd | 53rd |
| Primes | 167th | 204th |
| Pythagorean primes | 101st | |
| Sexy primes (1st member) | 74th | |
| Solinas primes | 43rd | |
| Super primes | 39th | |
| Ulam primes | 18th | |
| Roman numberals | CMXCI | MCCXLIX |
| Base 2 | 11110111112 | 100111000012 |
| Base 3 | 11002013 | 12010213 |
| Base 4 | 331334 | 1032014 |
| Base 5 | 124315 | 144445 |
| Base 6 | 43316 | 54416 |
| Base 7 | 26147 | 34337 |
| Base 8 | 17378 | 23418 |
| Base 9 | 13219 | 16379 |
| Base 10 | 99110 | 124910 |
| Base 11 | 82111 | a3611 |
| Base 12 | 6a712 | 88112 |
| Base 13 | 5b313 | 75113 |
| Base 14 | 50b14 | 65314 |
| Base 15 | 46115 | 58415 |
| Base 16 | 3df16 | 4e116 |