4447

Number
$4447$ (four thousand, four hundred and forty-seven) is:


 * The $604$th prime number


 * The $39$th centered hexagonal number after $1, 7, 19, 37, 61, 91, 127, \ldots, 2791, 2977, 3169, 3367, 3571, 3781, 3997, 4219$:
 * $4447 = \displaystyle 1 + \sum_{k \mathop = 1}^{39 - 1} 6 k = 39^3 - 38^3$