Compare 199909 vs 199921

Property	199909	199921
Type	prime	prime
Unique factors	1	1
Total factors	1	1
Prime factorization	199909¹	199921¹
Prime factorization	199909	199921
Divisors count	2	2
Divisors	1, 199909	1, 199921
Number of properties	4	5
Additive primes	7220th	7221st
Isolated primes	13661st	13662nd
Primes	17978th	17979th
Pythagorean primes	8974th	8975th
Ulam primes		1289th
Roman numberals
Base 2	110000110011100101₂	110000110011110001₂
Base 3	101011020001₃	101011020111₃
Base 4	300303211₄	300303301₄
Base 5	22344114₅	22344141₅
Base 6	4141301₆	4141321₆
Base 7	1461553₇	1461601₇
Base 8	606345₈	606361₈
Base 9	334201₉	334214₉
Base 10	199909₁₀	199921₁₀
Base 11	127216₁₁	127227₁₁
Base 12	97831₁₂	97841₁₂
Base 13	6ccb8₁₃	6ccc7₁₃
Base 14	52bd3₁₄	52c01₁₄
Base 15	3e374₁₅	3e381₁₅
Base 16	30ce5₁₆	30cf1₁₆