86

Number
$86$ (eighty-six) is:
 * $2 \times 43$


 * The $7$th noncototient after $10, 26, 34, 50, 52, 58$:
 * $\nexists m \in \Z_{>0}: m - \phi \left({m}\right) = 86$
 * where $\phi \left({m}\right)$ denotes the Euler $\phi$ function