Compare 991 vs 2039
| Property | 991 | 2039 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 9911 | 20391 |
| Prime factorization | 991 | 2039 |
| Divisors count | 2 | 2 |
| Divisors | 1, 991 | 1, 2039 |
| Number of properties | 10 | 8 |
| Additive primes | 89th | |
| Chen primes | 115th | 190th |
| Emirps | 36th | |
| Happy primes | 56th | |
| Harmonic primes | 115th | |
| Isolated primes | 98th | 186th |
| Lucky primes | 42nd | |
| Primes | 167th | 309th |
| Safe primes | 39th | |
| Sexy primes (1st member) | 74th | |
| Solinas primes | 43rd | 55th |
| Sophie germain primes | 62nd | |
| Super primes | 39th | |
| Ulam primes | 18th | |
| Roman numberals | CMXCI | MMXXXIX |
| Base 2 | 11110111112 | 111111101112 |
| Base 3 | 11002013 | 22101123 |
| Base 4 | 331334 | 1333134 |
| Base 5 | 124315 | 311245 |
| Base 6 | 43316 | 132356 |
| Base 7 | 26147 | 56427 |
| Base 8 | 17378 | 37678 |
| Base 9 | 13219 | 27159 |
| Base 10 | 99110 | 203910 |
| Base 11 | 82111 | 159411 |
| Base 12 | 6a712 | 121b12 |
| Base 13 | 5b313 | c0b13 |
| Base 14 | 50b14 | a5914 |
| Base 15 | 46115 | 90e15 |
| Base 16 | 3df16 | 7f716 |