337

Number
$337$ (three hundred and thirty-seven) is:


 * The $68$th prime number


 * The $17$th emirp after $13, 17, 31, 37, 71, 73, 79, 97, 107, 113, 149, 157, 167, 179, 199, 311$.


 * The $18$th permutable prime after $2, 3, 5, 7, 11, 13, 17, 31, 37, 71, 73, 79, 97, 113, 131, 199, 311$.


 * The $6$th obstinate number after $1, 127, 149, 251, 331$.


 * The smaller of the $5$th pair of primes whose prime gap is $10$:
 * $347 - 337 = 10$


 * The $8$th of the sequence of $n$ such that $p_n \# - 1$, where $p_n \#$ denotes primorial of $n$, is prime:
 * $3, 5, 11, 13, 41, 89, 317, 337$