Compare 991 vs 1051
| Property | 991 | 1051 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 9911 | 10511 |
| Prime factorization | 991 | 1051 |
| Divisors count | 2 | 2 |
| Divisors | 1, 991 | 1, 1051 |
| Number of properties | 10 | 5 |
| Additive primes | 89th | 95th |
| Centered decagonal primes | 10th | |
| Chen primes | 115th | |
| Emirps | 36th | |
| Isolated primes | 98th | |
| Long primes | 64th | |
| Lucky primes | 42nd | |
| Primes | 167th | 177th |
| Sexy primes (1st member) | 74th | |
| Solinas primes | 43rd | |
| Super primes | 39th | |
| Twin primes (2nd member) | 38th | |
| Ulam primes | 18th | |
| Roman numberals | CMXCI | MLI |
| Base 2 | 11110111112 | 100000110112 |
| Base 3 | 11002013 | 11022213 |
| Base 4 | 331334 | 1001234 |
| Base 5 | 124315 | 132015 |
| Base 6 | 43316 | 45116 |
| Base 7 | 26147 | 30317 |
| Base 8 | 17378 | 20338 |
| Base 9 | 13219 | 13879 |
| Base 10 | 99110 | 105110 |
| Base 11 | 82111 | 87611 |
| Base 12 | 6a712 | 73712 |
| Base 13 | 5b313 | 62b13 |
| Base 14 | 50b14 | 55114 |
| Base 15 | 46115 | 4a115 |
| Base 16 | 3df16 | 41b16 |