394

Number
$394$ (three hundred and ninety-four) is:


 * $2 \times 197$


 * The $3$rd candidate Lychrel number.


 * The $40$th noncototient after $10$, $26$, $34$, $50$, $\ldots$, $344$, $346$, $362$, $366$, $372$, $386$:
 * $\nexists m \in \Z_{>0}: m - \map \phi m = 394$
 * where $\map \phi m$ denotes the Euler $\phi$ function