13,649

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Number

$13 \, 649$ (thirteen thousand, six hundred and forty-nine) is:

The $1613$rd prime number

The $15$th prime $p$ such that $p \# + 1$, where $p \#$ denotes primorial (product of all primes up to $p$) of $p$, is prime:

$2$, $3$, $5$, $7$, $11$, $31$, $379$, $1019$, $1021$, $2657$, $3229$, $4547$, $4787$, $11 \, 549$, $13 \, 649$

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