Compare 1009 vs 1021
| Property | 1009 | 1021 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 10091 | 10211 |
| Prime factorization | 1009 | 1021 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1009 | 1, 1021 |
| Number of properties | 10 | 8 |
| Chen primes | 116th | |
| Cousin primes (1st member) | 42nd | |
| Emirps | 37th | 38th |
| Good primes | 45th | |
| Happy primes | 36th | |
| Harmonic primes | 61st | |
| Isolated primes | 100th | |
| Long primes | 62nd | |
| Lucky primes | 44th | 45th |
| Primes | 169th | 172nd |
| Pythagorean primes | 81st | 83rd |
| Solinas primes | 44th | 46th |
| Twin primes (2nd member) | 36th | |
| Roman numberals | MIX | MXXI |
| Base 2 | 11111100012 | 11111111012 |
| Base 3 | 11011013 | 11012113 |
| Base 4 | 333014 | 333314 |
| Base 5 | 130145 | 130415 |
| Base 6 | 44016 | 44216 |
| Base 7 | 26417 | 26567 |
| Base 8 | 17618 | 17758 |
| Base 9 | 13419 | 13549 |
| Base 10 | 100910 | 102110 |
| Base 11 | 83811 | 84911 |
| Base 12 | 70112 | 71112 |
| Base 13 | 5c813 | 60713 |
| Base 14 | 52114 | 52d14 |
| Base 15 | 47415 | 48115 |
| Base 16 | 3f116 | 3fd16 |