1013

Number
$1013$ (one thousand and thirteen) is:


 * The $170$th prime number


 * The $38$th Sophie Germain prime after $2$, $3$, $5$, $11$, $23$, $29$, $41$, $\ldots$, $653$, $659$, $683$, $719$, $743$, $761$, $809$, $911$, $953$:
 * $2 \times 1013 + 1 = 2027$, which is prime.