15,877

Number
$15 \, 877$ (fifteen thousand, eight hundred and seventy-seven) is:


 * The $1849$th prime number


 * The $18$th prime $p$ such that $p \# - 1$, where $p \#$ denotes primorial (product of all primes up to $p$) of $p$, is prime:
 * $3$, $5$, $11$, $13$, $41$, $89$, $317$, $337$, $991$, $1873$, $2053$, $2377$, $4093$, $4297$, $4583$, $6569$, $13 \, 033$, $15 \, 877$