2977
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Number
$2977$ (two thousand, nine hundred and seventy-seven) is:
- $13 \times 229$
- The $32$nd centered hexagonal number after $1$, $7$, $19$, $37$, $61$, $91$, $127$, $\ldots$, $1387$, $1519$, $1657$, $1801$, $1951$, $2107$, $2269$, $2437$, $2611$, $2791$:
- $2977 = \ds 1 + \sum_{k \mathop = 1}^{32 - 1} 6 k = 32^3 - 31^3$