599

Number
$599$ (five hundred and ninety-nine) is:


 * The $109$th prime number


 * The $9$th obstinate number after $1$, $127$, $149$, $251$, $331$, $337$, $373$, $509$


 * The $23$rd right-truncatable prime after $2$, $3$, $5$, $7$, $23$, $29$, $31$, $37$, $53$, $59$, $71$, $73$, $79$, $233$, $239$, $293$, $311$, $313$, $317$, $373$, $379$, $593$


 * The smaller of the $27$th pair of twin primes:
 * $601 - 599 = 2$