Compare 3945 vs 3947
| Property | 3945 | 3947 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 31 × 51 × 2631 | 39471 |
| Prime factorization | 3 × 5 × 263 | 3947 |
| Divisors count | 8 | 2 |
| Divisors | 1, 3, 5, 15, 263, 789, 1315, 3945 | 1, 3947 |
| Number of properties | 0 | 8 |
| Additive primes | 280th | |
| Chen primes | 319th | |
| Cousin primes (2nd member) | 108th | |
| Isolated primes | 343rd | |
| Left-truncatable primes | 87th | |
| Primes | 548th | |
| Restricted left-truncatable primes | 5th | |
| Safe primes | 60th | |
| Roman numberals | MMMCMXLV | MMMCMXLVII |
| Base 2 | 1111011010012 | 1111011010112 |
| Base 3 | 121020103 | 121020123 |
| Base 4 | 3312214 | 3312234 |
| Base 5 | 1112405 | 1112425 |
| Base 6 | 301336 | 301356 |
| Base 7 | 143347 | 143367 |
| Base 8 | 75518 | 75538 |
| Base 9 | 53639 | 53659 |
| Base 10 | 394510 | 394710 |
| Base 11 | 2a6711 | 2a6911 |
| Base 12 | 234912 | 234b12 |
| Base 13 | 1a4613 | 1a4813 |
| Base 14 | 161b14 | 161d14 |
| Base 15 | 128015 | 128215 |
| Base 16 | f6916 | f6b16 |