359

Number
$359$ (three hundred and fifty-nine) is:


 * The $72$nd prime number


 * The smaller of the $2$nd pair of primes whose prime gap is $8$:
 * $367 - 359 = 8$


 * The $3$rd term after $89, 179$ of the smallest sequence of $6$ primes formed by doubling and adding one:
 * $\left({89, 179, 359, 719, 1439, 2879}\right)$


 * The $21$st Sophie Germain prime after $2$, $3$, $5$, $11$, $23$, $29$, $41$, $53$, $83$, $89$, $113$, $131$, $173$, $179$, $191$, $233$, $239$, $251$, $281$, $293$:
 * $2 \times 359 + 1 = 719$, which is prime.