343

Number
$343$ (three hundred and forty-three) is:


 * $7^3$


 * The $3$rd power of $7$ after $(1)$, $7$, $49$:
 * $343 = 7^3$


 * The $3$rd palindromic cube after $1$, $8$:
 * $343 = 7^3$


 * The $7$th cube number after $1$, $8$, $27$, $64$, $125$, $216$:
 * $343 = 7 \times 7 \times 7$


 * The $18$th number after $1$, $3$, $22$, $66$, $70$, $81$, $94$, $115$, $119$, $170$, $210$, $214$, $217$, $265$, $282$, $310$, $322$, and the $1$st cube, whose $\sigma$ value is square:


 * The $31$st powerful number after $1$, $4$, $8$, $9$, $16$, $25$, $\ldots$, $144$, $169$, $196$, $200$, $216$, $225$, $243$, $256$, $288$, $289$, $324$