Compare 991 vs 1013
| Property | 991 | 1013 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 9911 | 10131 |
| Prime factorization | 991 | 1013 |
| Divisors count | 2 | 2 |
| Divisors | 1, 991 | 1, 1013 |
| Number of properties | 10 | 8 |
| Additive primes | 89th | 90th |
| Centered square primes | 11th | |
| Chen primes | 115th | |
| Cousin primes (2nd member) | 42nd | |
| Emirps | 36th | |
| Isolated primes | 98th | 101st |
| Lucky primes | 42nd | |
| Primes | 167th | 170th |
| Pythagorean primes | 82nd | |
| Sexy primes (1st member) | 74th | 75th |
| Solinas primes | 43rd | |
| Sophie germain primes | 38th | |
| Super primes | 39th | |
| Ulam primes | 18th | |
| Roman numberals | CMXCI | MXIII |
| Base 2 | 11110111112 | 11111101012 |
| Base 3 | 11002013 | 11011123 |
| Base 4 | 331334 | 333114 |
| Base 5 | 124315 | 130235 |
| Base 6 | 43316 | 44056 |
| Base 7 | 26147 | 26457 |
| Base 8 | 17378 | 17658 |
| Base 9 | 13219 | 13459 |
| Base 10 | 99110 | 101310 |
| Base 11 | 82111 | 84111 |
| Base 12 | 6a712 | 70512 |
| Base 13 | 5b313 | 5cc13 |
| Base 14 | 50b14 | 52514 |
| Base 15 | 46115 | 47815 |
| Base 16 | 3df16 | 3f516 |