Compare 639949 vs 639961

Property	639949	639961
Type	prime	semiprime
Unique factors	1	2
Total factors	1	2
Prime factorization	639949¹	7¹ × 91423¹
Prime factorization	639949	7 × 91423
Divisors count	2	4
Divisors	1, 639949	1, 7, 91423, 639961
Number of properties	3	1
Isolated primes	40810th
Primes	52071st
Semiprimes		137137th
Ulam primes	3816th
Roman numberals
Base 2	10011100001111001101₂	10011100001111011001₂
Base 3	1012111211211₃	1012111212021₃
Base 4	2130033031₄	2130033121₄
Base 5	130434244₅	130434321₅
Base 6	21414421₆	21414441₆
Base 7	5303512₇	5303530₇
Base 8	2341715₈	2341731₈
Base 9	1174754₉	1174767₉
Base 10	639949₁₀	639961₁₀
Base 11	3a7892₁₁	3a78a3₁₁
Base 12	26a411₁₂	26a421₁₂
Base 13	19538b₁₃	19539a₁₃
Base 14	129309₁₄	129317₁₄
Base 15	c9934₁₅	c9941₁₅
Base 16	9c3cd₁₆	9c3d9₁₆