Compare 199919 vs 199931

Property	199919	199931
Type	semiprime	prime
Unique factors	2	1
Total factors	2	1
Prime factorization	31¹ × 6449¹	199931¹
Prime factorization	31 × 6449	199931
Divisors count	4	2
Divisors	1, 31, 6449, 199919	1, 199931
Number of properties	1	6
Chen primes		7524th
Emirps		4276th
Harmonic primes		6757th
Long primes		6736th
Primes		17980th
Semiprimes	45210th
Twin primes (1st member)		2160th
Roman numberals
Base 2	110000110011101111₂	110000110011111011₂
Base 3	101011020102₃	101011020212₃
Base 4	300303233₄	300303323₄
Base 5	22344134₅	22344211₅
Base 6	4141315₆	4141335₆
Base 7	1461566₇	1461614₇
Base 8	606357₈	606373₈
Base 9	334212₉	334225₉
Base 10	199919₁₀	199931₁₀
Base 11	127225₁₁	127236₁₁
Base 12	9783b₁₂	9784b₁₂
Base 13	6ccc5₁₃	70004₁₃
Base 14	52bdd₁₄	52c0b₁₄
Base 15	3e37e₁₅	3e38b₁₅
Base 16	30cef₁₆	30cfb₁₆