Compare 631 vs 991
| Property | 631 | 991 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6311 | 9911 |
| Prime factorization | 631 | 991 |
| Divisors count | 2 | 2 |
| Divisors | 1, 631 | 1, 991 |
| Number of properties | 6 | 10 |
| Additive primes | 89th | |
| Centered triangular primes | 7th | |
| Chen primes | 80th | 115th |
| Cuban primes 1 | 10th | |
| Emirps | 36th | |
| Isolated primes | 60th | 98th |
| Lucky primes | 32nd | 42nd |
| Primes | 115th | 167th |
| Sexy primes (1st member) | 74th | |
| Solinas primes | 43rd | |
| Super primes | 39th | |
| Ulam primes | 18th | |
| Roman numberals | DCXXXI | CMXCI |
| Base 2 | 10011101112 | 11110111112 |
| Base 3 | 2121013 | 11002013 |
| Base 4 | 213134 | 331334 |
| Base 5 | 100115 | 124315 |
| Base 6 | 25316 | 43316 |
| Base 7 | 15617 | 26147 |
| Base 8 | 11678 | 17378 |
| Base 9 | 7719 | 13219 |
| Base 10 | 63110 | 99110 |
| Base 11 | 52411 | 82111 |
| Base 12 | 44712 | 6a712 |
| Base 13 | 39713 | 5b313 |
| Base 14 | 33114 | 50b14 |
| Base 15 | 2c115 | 46115 |
| Base 16 | 27716 | 3df16 |