4,700,063,497

Number
$4 \, 700 \, 063 \, 497$ is:


 * $19 \times 47 \times 5 \, 263 \, 229$


 * The smallest positive integer $n$ such that $2^n - 3$ is divisible by $n$

Also see

 * Smallest n for which 2^n-3 is Divisible by n