Compare 947 vs 991
| Property | 947 | 991 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 9471 | 9911 |
| Prime factorization | 947 | 991 |
| Divisors count | 2 | 2 |
| Divisors | 1, 947 | 1, 991 |
| Number of properties | 7 | 10 |
| Additive primes | 89th | |
| Chen primes | 110th | 115th |
| Emirps | 36th | |
| Isolated primes | 92nd | 98th |
| Left-truncatable primes | 50th | |
| Lucky primes | 42nd | |
| Primes | 161st | 167th |
| Sexy primes (1st member) | 71st | 74th |
| Sexy primes (2nd member) | 70th | |
| Sexy prime triplets (2nd member) | 27th | |
| Solinas primes | 43rd | |
| Super primes | 39th | |
| Ulam primes | 18th | |
| Roman numberals | CMXLVII | CMXCI |
| Base 2 | 11101100112 | 11110111112 |
| Base 3 | 10220023 | 11002013 |
| Base 4 | 323034 | 331334 |
| Base 5 | 122425 | 124315 |
| Base 6 | 42156 | 43316 |
| Base 7 | 25227 | 26147 |
| Base 8 | 16638 | 17378 |
| Base 9 | 12629 | 13219 |
| Base 10 | 94710 | 99110 |
| Base 11 | 79111 | 82111 |
| Base 12 | 66b12 | 6a712 |
| Base 13 | 57b13 | 5b313 |
| Base 14 | 4b914 | 50b14 |
| Base 15 | 43215 | 46115 |
| Base 16 | 3b316 | 3df16 |