Compare 991 vs 1033
| Property | 991 | 1033 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 9911 | 10331 |
| Prime factorization | 991 | 1033 |
| Divisors count | 2 | 2 |
| Divisors | 1, 991 | 1, 1033 |
| Number of properties | 10 | 10 |
| Additive primes | 89th | 93rd |
| Chen primes | 115th | |
| Emirps | 36th | 40th |
| Happy primes | 37th | |
| Harmonic primes | 62nd | |
| Isolated primes | 98th | |
| Long primes | 63rd | |
| Lucky primes | 42nd | |
| Primes | 167th | 174th |
| Pythagorean primes | 84th | |
| Sexy primes (1st member) | 74th | 76th |
| Solinas primes | 43rd | 48th |
| Super primes | 39th | |
| Twin primes (2nd member) | 37th | |
| Ulam primes | 18th | |
| Roman numberals | CMXCI | MXXXIII |
| Base 2 | 11110111112 | 100000010012 |
| Base 3 | 11002013 | 11020213 |
| Base 4 | 331334 | 1000214 |
| Base 5 | 124315 | 131135 |
| Base 6 | 43316 | 44416 |
| Base 7 | 26147 | 30047 |
| Base 8 | 17378 | 20118 |
| Base 9 | 13219 | 13679 |
| Base 10 | 99110 | 103310 |
| Base 11 | 82111 | 85a11 |
| Base 12 | 6a712 | 72112 |
| Base 13 | 5b313 | 61613 |
| Base 14 | 50b14 | 53b14 |
| Base 15 | 46115 | 48d15 |
| Base 16 | 3df16 | 40916 |