Compare 4 vs 7

Property	4	7
Type	semiprime	prime
Unique factors	1	1
Total factors	2	1
Prime factorization	2²	7¹
Prime factorization	2 × 2	7
Divisors count	3	2
Divisors	1, 2, 4	1, 7
Number of properties	1	37
Additive primes		4th
Carol primes		1st
Chen primes		4th
Class 1+ primes		4th
Cousin primes (1st member)		2nd
Cousin primes (2nd member)		1st
Cuban primes 1		1st
Double mersenne primes		1st
Euclid primes		3rd
Factorial primes		4th
Happy primes		1st
Kynea primes		2nd
Left-truncatable primes		4th
Long primes		1st
Lucas primes		3rd
Lucky primes		2nd
Mersenne primes		2nd
Multiplicative primes		4th
Palindromic primes		4th
Pierpont primes		4th
Pierpont primes of the 2nd kind		4th
Primes		4th
Prime quadruplets (2nd member)		1st
Prime quintuplet 1s (1st member)		1st
Prime quintuplet 2s (2nd member)		1st
Prime sextuplets (1st member)		1st
Prime triplets (1st member)		2nd
Prime triplets (2nd member)		1st
Right-truncatable primes		4th
Safe primes		2nd
Semiprimes	1st
Sexy primes (1st member)		2nd
Sexy prime triplets (1st member)		2nd
Solinas primes		3rd
Thabit primes of the 2nd kind		1st
Twin primes (2nd member)		2nd
Two-sided primes		4th
Woodall primes		1st
Roman numberals	IV	VII
Base 2	100₂	111₂
Base 3	11₃	21₃
Base 4	10₄	13₄
Base 5	4₅	12₅
Base 6	4₆	11₆
Base 7	4₇	10₇
Base 8	4₈	7₈
Base 9	4₉	7₉
Base 10	4₁₀	7₁₀
Base 11	4₁₁	7₁₁
Base 12	4₁₂	7₁₂
Base 13	4₁₃	7₁₃
Base 14	4₁₄	7₁₄
Base 15	4₁₅	7₁₅
Base 16	4₁₆	7₁₆