Compare 639637 vs 639640

Property	639637	639640
Type	prime	composite number
Unique factors	1	3
Total factors	1	5
Prime factorization	639637¹	2³ × 5¹ × 15991¹
Prime factorization	639637	2 × 2 × 2 × 5 × 15991
Divisors count	2	16
Divisors	1, 639637	1, 2, 4, 5, 8, 10, 20, 40, 15991, 31982, 63964, 79955, 127928, 159910, 319820, 639640
Number of properties	3	0
Isolated primes	40793rd
Primes	52048th
Sexy primes (2nd member)	11279th
Roman numberals
Base 2	10011100001010010101₂	10011100001010011000₂
Base 3	1012111102021₃	1012111102101₃
Base 4	2130022111₄	2130022120₄
Base 5	130432022₅	130432030₅
Base 6	21413141₆	21413144₆
Base 7	5302555₇	5302561₇
Base 8	2341225₈	2341230₈
Base 9	1174367₉	1174371₉
Base 10	639637₁₀	639640₁₀
Base 11	3a7629₁₁	3a7631₁₁
Base 12	26a1b1₁₂	26a1b4₁₂
Base 13	1951ab₁₃	1951b1₁₃
Base 14	129165₁₄	129168₁₄
Base 15	c97c7₁₅	c97ca₁₅
Base 16	9c295₁₆	9c298₁₆