Compare 2009 vs 2017
| Property | 2009 | 2017 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 2 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 72 × 411 | 20171 |
| Prime factorization | 7 × 7 × 41 | 2017 |
| Divisors count | 6 | 2 |
| Divisors | 1, 7, 41, 49, 287, 2009 | 1, 2017 |
| Number of properties | 0 | 7 |
| Chen primes | 187th | |
| Isolated primes | 185th | |
| Long primes | 117th | |
| Primes | 306th | |
| Pythagorean primes | 148th | |
| Sexy primes (2nd member) | 130th | |
| Solinas primes | 54th | |
| Roman numberals | MMIX | MMXVII |
| Base 2 | 111110110012 | 111111000012 |
| Base 3 | 22021023 | 22022013 |
| Base 4 | 1331214 | 1332014 |
| Base 5 | 310145 | 310325 |
| Base 6 | 131456 | 132016 |
| Base 7 | 56007 | 56117 |
| Base 8 | 37318 | 37418 |
| Base 9 | 26729 | 26819 |
| Base 10 | 200910 | 201710 |
| Base 11 | 156711 | 157411 |
| Base 12 | 11b512 | 120112 |
| Base 13 | bb713 | bc213 |
| Base 14 | a3714 | a4114 |
| Base 15 | 8de15 | 8e715 |
| Base 16 | 7d916 | 7e116 |