797

Number
$797$ (seven hundred and ninety-seven) is:


 * The $139$th prime number


 * The $12$th two-sided prime after $2$, $3$, $5$, $7$, $23$, $37$, $53$, $73$, $313$, $317$, $373$:
 * $797$ is prime; $79$, $7$ are prime; $97$, $7$ are prime


 * The larger of the $13$th pair of primes whose prime gap is $10$:
 * $797 - 787 = 10$


 * The $18$th palindromic prime:
 * $2$, $3$, $5$, $7$, $11$, $101$, $131$, $151$, $181$, $191$, $313$, $353$, $373$, $383$, $727$, $757$, $787$, $797$, $\ldots$