Compare 201809 vs 201813

Property	201809	201813
Type	prime	semiprime
Unique factors	1	2
Total factors	1	2
Prime factorization	201809¹	3¹ × 67271¹
Prime factorization	201809	3 × 67271
Divisors count	2	4
Divisors	1, 201809	1, 3, 67271, 201813
Number of properties	5	1
Chen primes	7580th
Harmonic primes	6807th
Isolated primes	13787th
Primes	18128th
Pythagorean primes	9049th
Semiprimes		45626th
Roman numberals
Base 2	110001010001010001₂	110001010001010101₂
Base 3	101020211102₃	101020211120₃
Base 4	301101101₄	301101111₄
Base 5	22424214₅	22424223₅
Base 6	4154145₆	4154153₆
Base 7	1500236₇	1500243₇
Base 8	612121₈	612125₈
Base 9	336742₉	336746₉
Base 10	201809₁₀	201813₁₀
Base 11	128693₁₁	128697₁₁
Base 12	98955₁₂	98959₁₂
Base 13	70b1a₁₃	70b21₁₃
Base 14	5378d₁₄	53793₁₄
Base 15	3ebde₁₅	3ebe3₁₅
Base 16	31451₁₆	31455₁₆