839

Number
$839$ (eight hundred and thirty-nine) is:


 * The $146$th prime number


 * The smaller of the $5$th pair of primes whose prime gap is $14$:
 * $853 - 839 = 14$


 * The larger of the $15$th pair of primes whose prime gap is $10$:
 * $839 - 829 = 10$


 * The $22$nd safe prime after $5$, $7$, $11$, $23$, $47$, $59$, $83$, $107$, $167$, $179$, $227$, $263$, $347$, $359$, $383$, $467$, $479$, $503$, $563$, $587$, $719$:
 * $839 = 2 \times 419 + 1$