Compare 199919 vs 199921

Property	199919	199921
Type	semiprime	prime
Unique factors	2	1
Total factors	2	1
Prime factorization	31¹ × 6449¹	199921¹
Prime factorization	31 × 6449	199921
Divisors count	4	2
Divisors	1, 31, 6449, 199919	1, 199921
Number of properties	1	5
Additive primes		7221st
Isolated primes		13662nd
Primes		17979th
Pythagorean primes		8975th
Semiprimes	45210th
Ulam primes		1289th
Roman numberals
Base 2	110000110011101111₂	110000110011110001₂
Base 3	101011020102₃	101011020111₃
Base 4	300303233₄	300303301₄
Base 5	22344134₅	22344141₅
Base 6	4141315₆	4141321₆
Base 7	1461566₇	1461601₇
Base 8	606357₈	606361₈
Base 9	334212₉	334214₉
Base 10	199919₁₀	199921₁₀
Base 11	127225₁₁	127227₁₁
Base 12	9783b₁₂	97841₁₂
Base 13	6ccc5₁₃	6ccc7₁₃
Base 14	52bdd₁₄	52c01₁₄
Base 15	3e37e₁₅	3e381₁₅
Base 16	30cef₁₆	30cf1₁₆