Compare 991 vs 1471
| Property | 991 | 1471 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 9911 | 14711 |
| Prime factorization | 991 | 1471 |
| Divisors count | 2 | 2 |
| Divisors | 1, 991 | 1, 1471 |
| Number of properties | 10 | 9 |
| Additive primes | 89th | 128th |
| Centered heptagonal primes | 7th | |
| Chen primes | 115th | 151st |
| Emirps | 36th | 70th |
| Harmonic primes | 79th | |
| Isolated primes | 98th | 138th |
| Lucky primes | 42nd | 57th |
| Primes | 167th | 233rd |
| Sexy primes (1st member) | 74th | |
| Solinas primes | 43rd | |
| Super primes | 39th | 51st |
| Ulam primes | 18th | |
| Roman numberals | CMXCI | MCDLXXI |
| Base 2 | 11110111112 | 101101111112 |
| Base 3 | 11002013 | 20001113 |
| Base 4 | 331334 | 1123334 |
| Base 5 | 124315 | 213415 |
| Base 6 | 43316 | 104516 |
| Base 7 | 26147 | 42017 |
| Base 8 | 17378 | 26778 |
| Base 9 | 13219 | 20149 |
| Base 10 | 99110 | 147110 |
| Base 11 | 82111 | 111811 |
| Base 12 | 6a712 | a2712 |
| Base 13 | 5b313 | 89213 |
| Base 14 | 50b14 | 77114 |
| Base 15 | 46115 | 68115 |
| Base 16 | 3df16 | 5bf16 |