Perfect cube checker

Check if a number is a perfect cube (can be expressed as n³ for some integer n).

Number

A perfect cube is n³ for some integer n. The first perfect cubes: 1, 8, 27, 64, 125, 216, 343, 512, 729, 1000...

Unlike squares, cubes can be negative: (−2)³ = −8, (−3)³ = −27. So −27 is a perfect cube.