Compare 409 vs 991
| Property | 409 | 991 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 4091 | 9911 |
| Prime factorization | 409 | 991 |
| Divisors count | 2 | 2 |
| Divisors | 1, 409 | 1, 991 |
| Number of properties | 9 | 10 |
| Additive primes | 47th | 89th |
| Centered triangular primes | 5th | |
| Chen primes | 57th | 115th |
| Emirps | 36th | |
| Happy primes | 22nd | |
| Isolated primes | 39th | 98th |
| Lucky primes | 22nd | 42nd |
| Primes | 80th | 167th |
| Pythagorean primes | 39th | |
| Sexy primes (1st member) | 74th | |
| Solinas primes | 43rd | |
| Super primes | 39th | |
| Ulam primes | 11th | 18th |
| Roman numberals | CDIX | CMXCI |
| Base 2 | 1100110012 | 11110111112 |
| Base 3 | 1200113 | 11002013 |
| Base 4 | 121214 | 331334 |
| Base 5 | 31145 | 124315 |
| Base 6 | 15216 | 43316 |
| Base 7 | 11237 | 26147 |
| Base 8 | 6318 | 17378 |
| Base 9 | 5049 | 13219 |
| Base 10 | 40910 | 99110 |
| Base 11 | 34211 | 82111 |
| Base 12 | 2a112 | 6a712 |
| Base 13 | 25613 | 5b313 |
| Base 14 | 21314 | 50b14 |
| Base 15 | 1c415 | 46115 |
| Base 16 | 19916 | 3df16 |