Compare 9 vs 23

Property	9	23
Type	semiprime	prime
Unique factors	1	1
Total factors	2	1
Prime factorization	3²	23¹
Prime factorization	3 × 3	23
Divisors count	3	2
Divisors	1, 3, 9	1, 23
Number of properties	1	30
Additive primes		6th
Chen primes		9th
Class 1+ primes		7th
Cousin primes (2nd member)		4th
Factorial primes		5th
Happy primes		4th
Harmonic primes		4th
Isolated primes		2nd
Kynea primes		3rd
Left-truncatable primes		7th
Long primes		4th
Pierpont primes of the 2nd kind		7th
Primes		9th
Prime quintuplet 2s (5th member)		2nd
Prime sextuplets (6th member)		1st
Prime triplets (3rd member)		5th
Right-truncatable primes		5th
Safe primes		4th
Semiprimes	3rd
Sexy primes (1st member)		6th
Sexy primes (2nd member)		5th
Sexy prime quadrupletss (4th member)		1st
Sexy prime quadrupletss (3rd member)		2nd
Sexy prime triplets (2nd member)		4th
Sexy prime triplets (3rd member)		3rd
Solinas primes		8th
Sophie germain primes		5th
Thabit primes		4th
Two-sided primes		5th
Wedderburn-etherington primes		4th
Woodall primes		2nd
Roman numberals	IX	XXIII
Base 2	1001₂	10111₂
Base 3	100₃	212₃
Base 4	21₄	113₄
Base 5	14₅	43₅
Base 6	13₆	35₆
Base 7	12₇	32₇
Base 8	11₈	27₈
Base 9	10₉	25₉
Base 10	9₁₀	23₁₀
Base 11	9₁₁	21₁₁
Base 12	9₁₂	1b₁₂
Base 13	9₁₃	1a₁₃
Base 14	9₁₄	19₁₄
Base 15	9₁₅	18₁₅
Base 16	9₁₆	17₁₆