Compare 640249 vs 640457

Property	640249	640457
Type	prime	prime
Unique factors	1	1
Total factors	1	1
Prime factorization	640249¹	640457¹
Prime factorization	640249	640457
Divisors count	2	2
Divisors	1, 640249	1, 640457
Number of properties	3	4
Chen primes		20391st
Isolated primes		40839th
Primes	52098th	52110th
Sexy primes (1st member)		11290th
Twin primes (2nd member)	5635th
Ulam primes	3819th
Roman numberals
Base 2	10011100010011111001₂	10011100010111001001₂
Base 3	1012112020221₃	1012112112122₃
Base 4	2130103321₄	2130113021₄
Base 5	130441444₅	130443312₅
Base 6	21420041₆	21421025₆
Base 7	5304421₇	5305136₇
Base 8	2342371₈	2342711₈
Base 9	1175227₉	1175478₉
Base 10	640249₁₀	640457₁₀
Base 11	3a8035₁₁	3a8204₁₁
Base 12	26a621₁₂	26a775₁₂
Base 13	19555c₁₃	19568c₁₃
Base 14	129481₁₄	12958d₁₄
Base 15	c9a84₁₅	c9b72₁₅
Base 16	9c4f9₁₆	9c5c9₁₆