Compare 640669 vs 640691

Property	640669	640691
Type	prime	prime
Unique factors	1	1
Total factors	1	1
Prime factorization	640669¹	640691¹
Prime factorization	640669	640691
Divisors count	2	2
Divisors	1, 640669	1, 640691
Number of properties	6	5
Additive primes	20372nd
Chen primes	20396th	20397th
Cousin primes (2nd member)		5637th
Isolated primes		40853rd
Primes	52126th	52128th
Prime triplets (3rd member)	2063rd
Sexy primes (2nd member)	11293rd
Sophie germain primes		5311th
Twin primes (2nd member)	5638th
Roman numberals
Base 2	10011100011010011101₂	10011100011010110011₂
Base 3	1012112211111₃	1012112212022₃
Base 4	2130122131₄	2130122303₄
Base 5	131000134₅	131000231₅
Base 6	21422021₆	21422055₆
Base 7	5305561₇	5305622₇
Base 8	2343235₈	2343263₈
Base 9	1175744₉	1175768₉
Base 10	640669₁₀	640691₁₀
Base 11	3a8387₁₁	3a83a7₁₁
Base 12	26a911₁₂	26a92b₁₂
Base 13	1957c3₁₃	19580c₁₃
Base 14	1296a1₁₄	1296b9₁₄
Base 15	c9c64₁₅	c9c7b₁₅
Base 16	9c69d₁₆	9c6b3₁₆