Compare 991901 vs 991999
| Property | 991901 | 991999 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 9919011 | 9919991 |
| Prime factorization | 991901 | 991999 |
| Divisors count | 2 | 2 |
| Divisors | 1, 991901 | 1, 991999 |
| Number of properties | 5 | 4 |
| Additive primes | 29902nd | |
| Chen primes | 29746th | |
| Emirps | 10991st | 10999th |
| Isolated primes | 61692nd | 61702nd |
| Lucky primes | 8558th | |
| Primes | 77915th | 77927th |
| Roman numberals | ||
| Base 2 | 111100100010100111012 | 111100100010111111112 |
| Base 3 | 12121011220023 | 12121012022013 |
| Base 4 | 33020221314 | 33020233334 |
| Base 5 | 2232201015 | 2232204445 |
| Base 6 | 331320456 | 331323316 |
| Base 7 | 113005617 | 113010617 |
| Base 8 | 36212358 | 36213778 |
| Base 9 | 17715629 | 17716819 |
| Base 10 | 99190110 | 99199910 |
| Base 11 | 61825911 | 61833811 |
| Base 12 | 3ba02512 | 3ba0a712 |
| Base 13 | 28963113 | 2896a813 |
| Base 14 | 1bb6a114 | 1bb73114 |
| Base 15 | 148d6b15 | 148dd415 |
| Base 16 | f229d16 | f22ff16 |