Compare 639997 vs 640019
| Property | 639997 | 640019 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6399971 | 6400191 |
| Prime factorization | 639997 | 640019 |
| Divisors count | 2 | 2 |
| Divisors | 1, 639997 | 1, 640019 |
| Number of properties | 4 | 4 |
| Additive primes | 20349th | |
| Chen primes | 20379th | |
| Isolated primes | 40813th | 40814th |
| Lucky primes | 5977th | |
| Primes | 52074th | 52077th |
| Safe primes | 3016th | |
| Roman numberals | ||
| Base 2 | 100111000011111111012 | 100111000100000100112 |
| Base 3 | 10121112201213 | 10121112211023 |
| Base 4 | 21300333314 | 21301001034 |
| Base 5 | 1304344425 | 1304400345 |
| Base 6 | 214145416 | 214150156 |
| Base 7 | 53036117 | 53036427 |
| Base 8 | 23417758 | 23420238 |
| Base 9 | 11748179 | 11748429 |
| Base 10 | 63999710 | 64001910 |
| Base 11 | 3a792611 | 3a794611 |
| Base 12 | 26a45112 | 26a46b12 |
| Base 13 | 1953c713 | 19541313 |
| Base 14 | 12934114 | 12935914 |
| Base 15 | c996715 | c997e15 |
| Base 16 | 9c3fd16 | 9c41316 |