Compare 998 vs 1009
| Property | 998 | 1009 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 21 × 4991 | 10091 |
| Prime factorization | 2 × 499 | 1009 |
| Divisors count | 4 | 2 |
| Divisors | 1, 2, 499, 998 | 1, 1009 |
| Number of properties | 1 | 10 |
| Chen primes | 116th | |
| Cousin primes (1st member) | 42nd | |
| Emirps | 37th | |
| Good primes | 45th | |
| Happy primes | 36th | |
| Isolated primes | 100th | |
| Lucky primes | 44th | |
| Primes | 169th | |
| Pythagorean primes | 81st | |
| Semiprimes | 299th | |
| Solinas primes | 44th | |
| Roman numberals | CMXCVIII | MIX |
| Base 2 | 11111001102 | 11111100012 |
| Base 3 | 11002223 | 11011013 |
| Base 4 | 332124 | 333014 |
| Base 5 | 124435 | 130145 |
| Base 6 | 43426 | 44016 |
| Base 7 | 26247 | 26417 |
| Base 8 | 17468 | 17618 |
| Base 9 | 13289 | 13419 |
| Base 10 | 99810 | 100910 |
| Base 11 | 82811 | 83811 |
| Base 12 | 6b212 | 70112 |
| Base 13 | 5ba13 | 5c813 |
| Base 14 | 51414 | 52114 |
| Base 15 | 46815 | 47415 |
| Base 16 | 3e616 | 3f116 |