94

Number
$94$ (ninety-four) is:


 * $2 \times 47$


 * The $32$nd semiprime:
 * $94 = 2 \times 47$


 * The $12$th nontotient after $14, 26, 34, 38, 50, 62, 68, 74, 76, 86, 90$:
 * $\nexists m \in \Z_{>0}: \phi \left({m}\right) = 94$
 * where $\phi \left({m}\right)$ denotes the Euler $\phi$ function


 * The $18$th happy number after $1, 7, 10, 13, 19, 23, 28, 31, 32, 44, 49, 68, 70, 79, 82, 86, 91$:
 * $94 \to 9^2 + 4^2 = 81 + 16 = 97 \to 9^2 + 7^2 = 81 + 49 = 130 \to 1^2 + 3^2 + 0^2 = 1 + 9 + 0 = 10 \to 1^2 + 0^2 = 1$


 * The $7$th number after $1, 3, 22, 66, 70, 81$ whose $\sigma$ value is square:


 * The $3$rd even integer after $2, 4$ that cannot be expressed as the sum of $2$ prime numbers which are each one of a pair of twin primes.

Also see