Compare 639940 vs 639949

Property	639940	639949
Type	composite number	prime
Unique factors	4	1
Total factors	6	1
Prime factorization	2² × 5¹ × 7² × 653¹	639949¹
Prime factorization	2 × 2 × 5 × 7 × 7 × 653	639949
Divisors count	36	2
Divisors	1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 653, 980, 1306, 2612, 3265, 4571, 6530, 9142, 13060, 18284, 22855, 31997, 45710, 63994, 91420, 127988, 159985, 319970, 639940	1, 639949
Number of properties	0	3
Isolated primes		40810th
Primes		52071st
Ulam primes		3816th
Roman numberals
Base 2	10011100001111000100₂	10011100001111001101₂
Base 3	1012111211111₃	1012111211211₃
Base 4	2130033010₄	2130033031₄
Base 5	130434230₅	130434244₅
Base 6	21414404₆	21414421₆
Base 7	5303500₇	5303512₇
Base 8	2341704₈	2341715₈
Base 9	1174744₉	1174754₉
Base 10	639940₁₀	639949₁₀
Base 11	3a7884₁₁	3a7892₁₁
Base 12	26a404₁₂	26a411₁₂
Base 13	195382₁₃	19538b₁₃
Base 14	129300₁₄	129309₁₄
Base 15	c992a₁₅	c9934₁₅
Base 16	9c3c4₁₆	9c3cd₁₆