11,617

Number
$11 \, 617$ (eleven thousand, six hundred and seventeen) is:


 * The $1397$th prime number


 * The $3$rd after $11 \, 593$, $11 \, 597$ of a sequence of consecutive prime numbers all of the form $4 n + 1$:
 * $11 \, 617 = 4 \times 2904 + 1$