Cube Root of 87
Cube Root Calculator
What is the cube root of 87?
Answer
∛87 ≈
4.431
Real cube root: the only number whose cube is 87.
≈ — rounded to 4 decimal places. 87 is not the cube of a rational number, so ∛87 is irrational: its decimal expansion never ends and never repeats.
- Prime factors
- 87 = 3 × 29
- Take out of the root
- No prime appears three times, so ∛87 is already in simplest form.
- Between cubes
- 4³ = 64 < 87 < 125 = 5³, so 4 < ∛87 < 5 and ∛87 ≈ 4.431
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See Also
- Square Root Calculator - Calculate the square root of any number
- Simplify Square Root Calculator - Write any square root in simplest radical form, step by step
- Prime Factorization - Prime Factorization Calculator
- Scientific Calculator with Memory & History - Free Engineering Calculator Online with Memory Function, Operation History, Logarithms & Trigonometry. Similar to ti-83, ti-84, ti-89
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FAQ
What is the cube root of 87?
∛87 ≈ 4.431
Can ∛87 be simplified?
No: no prime appears three times in 87, so its only cube factor is 1 and ∛87 is already in simplest form. Since 4³ = 64 < 87 < 125 = 5³, ∛87 lies between 4 and 5: ∛87 ≈ 4.431.
Is ∛87 a rational number?
No: 87 is not the cube of a rational number, and the cube root of a fraction p/q in lowest terms is rational only when p and q are both cubes. So ∛87 is irrational; its decimal never ends and never repeats: ∛87 ≈ 4.431.
See Also
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