Compare 991 vs 2393
| Property | 991 | 2393 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 9911 | 23931 |
| Prime factorization | 991 | 2393 |
| Divisors count | 2 | 2 |
| Divisors | 1, 991 | 1, 2393 |
| Number of properties | 10 | 12 |
| Additive primes | 89th | 187th |
| Chen primes | 115th | 215th |
| Cousin primes (2nd member) | 74th | |
| Emirps | 36th | |
| Happy primes | 64th | |
| Isolated primes | 98th | 213th |
| Lucky primes | 42nd | |
| Primes | 167th | 356th |
| Pythagorean primes | 175th | |
| Restricted right-truncatable primes | 5th | |
| Right-truncatable primes | 30th | |
| Sexy primes (1st member) | 74th | 147th |
| Solinas primes | 43rd | |
| Sophie germain primes | 70th | |
| Super primes | 39th | |
| Ulam primes | 18th | 27th |
| Roman numberals | CMXCI | MMCCCXCIII |
| Base 2 | 11110111112 | 1001010110012 |
| Base 3 | 11002013 | 100211223 |
| Base 4 | 331334 | 2111214 |
| Base 5 | 124315 | 340335 |
| Base 6 | 43316 | 150256 |
| Base 7 | 26147 | 66567 |
| Base 8 | 17378 | 45318 |
| Base 9 | 13219 | 32489 |
| Base 10 | 99110 | 239310 |
| Base 11 | 82111 | 188611 |
| Base 12 | 6a712 | 147512 |
| Base 13 | 5b313 | 112113 |
| Base 14 | 50b14 | c2d14 |
| Base 15 | 46115 | a9815 |
| Base 16 | 3df16 | 95916 |