Compare 199911 vs 199921
| Property | 199911 | 199921 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 31 × 371 × 18011 | 1999211 |
| Prime factorization | 3 × 37 × 1801 | 199921 |
| Divisors count | 8 | 2 |
| Divisors | 1, 3, 37, 111, 1801, 5403, 66637, 199911 | 1, 199921 |
| Number of properties | 0 | 5 |
| Additive primes | 7221st | |
| Isolated primes | 13662nd | |
| Primes | 17979th | |
| Pythagorean primes | 8975th | |
| Ulam primes | 1289th | |
| Roman numberals | ||
| Base 2 | 1100001100111001112 | 1100001100111100012 |
| Base 3 | 1010110200103 | 1010110201113 |
| Base 4 | 3003032134 | 3003033014 |
| Base 5 | 223441215 | 223441415 |
| Base 6 | 41413036 | 41413216 |
| Base 7 | 14615557 | 14616017 |
| Base 8 | 6063478 | 6063618 |
| Base 9 | 3342039 | 3342149 |
| Base 10 | 19991110 | 19992110 |
| Base 11 | 12721811 | 12722711 |
| Base 12 | 9783312 | 9784112 |
| Base 13 | 6ccba13 | 6ccc713 |
| Base 14 | 52bd514 | 52c0114 |
| Base 15 | 3e37615 | 3e38115 |
| Base 16 | 30ce716 | 30cf116 |