Compare 985 vs 991
| Property | 985 | 991 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 1971 | 9911 |
| Prime factorization | 5 × 197 | 991 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 197, 985 | 1, 991 |
| Number of properties | 1 | 10 |
| Additive primes | 89th | |
| Chen primes | 115th | |
| Emirps | 36th | |
| Isolated primes | 98th | |
| Lucky primes | 42nd | |
| Primes | 167th | |
| Semiprimes | 295th | |
| Sexy primes (1st member) | 74th | |
| Solinas primes | 43rd | |
| Super primes | 39th | |
| Ulam primes | 18th | |
| Roman numberals | CMLXXXV | CMXCI |
| Base 2 | 11110110012 | 11110111112 |
| Base 3 | 11001113 | 11002013 |
| Base 4 | 331214 | 331334 |
| Base 5 | 124205 | 124315 |
| Base 6 | 43216 | 43316 |
| Base 7 | 26057 | 26147 |
| Base 8 | 17318 | 17378 |
| Base 9 | 13149 | 13219 |
| Base 10 | 98510 | 99110 |
| Base 11 | 81611 | 82111 |
| Base 12 | 6a112 | 6a712 |
| Base 13 | 5aa13 | 5b313 |
| Base 14 | 50514 | 50b14 |
| Base 15 | 45a15 | 46115 |
| Base 16 | 3d916 | 3df16 |