Compare 1965 vs 1973
| Property | 1965 | 1973 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 31 × 51 × 1311 | 19731 |
| Prime factorization | 3 × 5 × 131 | 1973 |
| Divisors count | 8 | 2 |
| Divisors | 1, 3, 5, 15, 131, 393, 655, 1965 | 1, 1973 |
| Number of properties | 0 | 7 |
| Good primes | 61st | |
| Harmonic primes | 111th | |
| Isolated primes | 179th | |
| Primes | 298th | |
| Pythagorean primes | 145th | |
| Sexy primes (1st member) | 126th | |
| Sophie germain primes | 60th | |
| Roman numberals | MCMLXV | MCMLXXIII |
| Base 2 | 111101011012 | 111101101012 |
| Base 3 | 22002103 | 22010023 |
| Base 4 | 1322314 | 1323114 |
| Base 5 | 303305 | 303435 |
| Base 6 | 130336 | 130456 |
| Base 7 | 55057 | 55167 |
| Base 8 | 36558 | 36658 |
| Base 9 | 26239 | 26329 |
| Base 10 | 196510 | 197310 |
| Base 11 | 152711 | 153411 |
| Base 12 | 117912 | 118512 |
| Base 13 | b8213 | b8a13 |
| Base 14 | a0514 | a0d14 |
| Base 15 | 8b015 | 8b815 |
| Base 16 | 7ad16 | 7b516 |