Compare 991 vs 1123
| Property | 991 | 1123 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 9911 | 11231 |
| Prime factorization | 991 | 1123 |
| Divisors count | 2 | 2 |
| Divisors | 1, 991 | 1, 1123 |
| Number of properties | 10 | 7 |
| Additive primes | 89th | 101st |
| Chen primes | 115th | |
| Emirps | 36th | |
| Isolated primes | 98th | 109th |
| Lucky primes | 42nd | 50th |
| Primes | 167th | 188th |
| Sexy primes (1st member) | 74th | 83rd |
| Sexy primes (2nd member) | 82nd | |
| Sexy prime triplets (2nd member) | 31st | |
| Solinas primes | 43rd | |
| Super primes | 39th | |
| Ulam primes | 18th | |
| Roman numberals | CMXCI | MCXXIII |
| Base 2 | 11110111112 | 100011000112 |
| Base 3 | 11002013 | 11121213 |
| Base 4 | 331334 | 1012034 |
| Base 5 | 124315 | 134435 |
| Base 6 | 43316 | 51116 |
| Base 7 | 26147 | 31637 |
| Base 8 | 17378 | 21438 |
| Base 9 | 13219 | 14779 |
| Base 10 | 99110 | 112310 |
| Base 11 | 82111 | 93111 |
| Base 12 | 6a712 | 79712 |
| Base 13 | 5b313 | 68513 |
| Base 14 | 50b14 | 5a314 |
| Base 15 | 46115 | 4ed15 |
| Base 16 | 3df16 | 46316 |