83,521

Number
$83 \, 521$ (eighty-three thousand, five hundred and twenty-one) is:
 * $17^4$


 * The $289$th square number:
 * $83 \, 521 = 289 \times 289$


 * The $17$th fourth power after $1$, $16$, $81$, $256$, $625$, $\ldots$, $28 \, 561$, $38 \, 416$, $50 \, 625$, $65 \, 536$:
 * $83 \, 521 = 17 \times 17 \times 17 \times 17$