Compare 991 vs 1039
| Property | 991 | 1039 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 9911 | 10391 |
| Prime factorization | 991 | 1039 |
| Divisors count | 2 | 2 |
| Divisors | 1, 991 | 1, 1039 |
| Number of properties | 10 | 9 |
| Additive primes | 89th | 94th |
| Chen primes | 115th | 119th |
| Emirps | 36th | |
| Happy primes | 38th | |
| Harmonic primes | 63rd | |
| Isolated primes | 98th | 102nd |
| Lucky primes | 42nd | 46th |
| Primes | 167th | 175th |
| Sexy primes (1st member) | 74th | |
| Sexy primes (2nd member) | 76th | |
| Solinas primes | 43rd | 49th |
| Super primes | 39th | |
| Ulam primes | 18th | |
| Roman numberals | CMXCI | MXXXIX |
| Base 2 | 11110111112 | 100000011112 |
| Base 3 | 11002013 | 11021113 |
| Base 4 | 331334 | 1000334 |
| Base 5 | 124315 | 131245 |
| Base 6 | 43316 | 44516 |
| Base 7 | 26147 | 30137 |
| Base 8 | 17378 | 20178 |
| Base 9 | 13219 | 13749 |
| Base 10 | 99110 | 103910 |
| Base 11 | 82111 | 86511 |
| Base 12 | 6a712 | 72712 |
| Base 13 | 5b313 | 61c13 |
| Base 14 | 50b14 | 54314 |
| Base 15 | 46115 | 49415 |
| Base 16 | 3df16 | 40f16 |