Compare 881 vs 991
| Property | 881 | 991 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 8811 | 9911 |
| Prime factorization | 881 | 991 |
| Divisors count | 2 | 2 |
| Divisors | 1, 881 | 1, 991 |
| Number of properties | 12 | 10 |
| Additive primes | 80th | 89th |
| Chen primes | 104th | 115th |
| Cousin primes (2nd member) | 37th | |
| Emirps | 36th | |
| Happy primes | 33rd | |
| Harmonic primes | 57th | |
| Isolated primes | 98th | |
| Lucky primes | 42nd | |
| Primes | 152nd | 167th |
| Prime triplets (1st member) | 30th | |
| Prime triplets (2nd member) | 29th | |
| Pythagorean primes | 74th | |
| Quartan primes | 7th | |
| Sexy primes (1st member) | 69th | 74th |
| Solinas primes | 43rd | |
| Super primes | 39th | |
| Twin primes (1st member) | 35th | |
| Ulam primes | 18th | |
| Roman numberals | DCCCLXXXI | CMXCI |
| Base 2 | 11011100012 | 11110111112 |
| Base 3 | 10121223 | 11002013 |
| Base 4 | 313014 | 331334 |
| Base 5 | 120115 | 124315 |
| Base 6 | 40256 | 43316 |
| Base 7 | 23667 | 26147 |
| Base 8 | 15618 | 17378 |
| Base 9 | 11789 | 13219 |
| Base 10 | 88110 | 99110 |
| Base 11 | 73111 | 82111 |
| Base 12 | 61512 | 6a712 |
| Base 13 | 52a13 | 5b313 |
| Base 14 | 46d14 | 50b14 |
| Base 15 | 3db15 | 46115 |
| Base 16 | 37116 | 3df16 |