394

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


 * $2 \times 197$


 * The $3$rd candidate Lychrel number.


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