3169
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Number
$3169$ (three thousand, one hundred and sixty-nine) is:
- The $449$th prime number
- The $33$rd centered hexagonal number after $1$, $7$, $19$, $37$, $61$, $91$, $127$, $\ldots$, $1801$, $1951$, $2107$, $2269$, $2437$, $2611$, $2791$, $2977$:
- $3169 = \ds 1 + \sum_{k \mathop = 1}^{33 - 1} 6 k = 33^3 - 32^3$