Cube Root of 91
Cube Root Calculator
What is the cube root of 91?
Answer
∛91 ≈
4.4979
Real cube root: the only number whose cube is 91.
≈ — rounded to 4 decimal places. 91 is not the cube of a rational number, so ∛91 is irrational: its decimal expansion never ends and never repeats.
- Prime factors
- 91 = 7 × 13
- Take out of the root
- No prime appears three times, so ∛91 is already in simplest form.
- Between cubes
- 4³ = 64 < 91 < 125 = 5³, so 4 < ∛91 < 5 and ∛91 ≈ 4.4979
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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 91?
∛91 ≈ 4.4979
Can ∛91 be simplified?
No: no prime appears three times in 91, so its only cube factor is 1 and ∛91 is already in simplest form. Since 4³ = 64 < 91 < 125 = 5³, ∛91 lies between 4 and 5: ∛91 ≈ 4.4979.
Is ∛91 a rational number?
No: 91 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 ∛91 is irrational; its decimal never ends and never repeats: ∛91 ≈ 4.4979.
See Also
- Cube Root of 81 (∛81): Exact Value and Decimal
- Cube Root of 82 (∛82): Exact Value and Decimal
- Cube Root of 83 (∛83): Exact Value and Decimal
- Cube Root of 84 (∛84): Exact Value and Decimal
- Cube Root of 85 (∛85): Exact Value and Decimal
- Cube Root of 86 (∛86): Exact Value and Decimal
- Cube Root of 87 (∛87): Exact Value and Decimal
- Cube Root of 88 (∛88): Exact Value and Decimal
- Cube Root of 89 (∛89): Exact Value and Decimal
- Cube Root of 90 (∛90): Exact Value and Decimal
- Cube Root of 91.125 (∛91.125): Exact Value and Decimal
- Cube Root of 92 (∛92): Exact Value and Decimal
- Cube Root of 93 (∛93): Exact Value and Decimal
- Cube Root of 94 (∛94): Exact Value and Decimal
- Cube Root of 95 (∛95): Exact Value and Decimal
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- Кубический корень из 91 (∛91): точное значение
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- Raiz cúbica de 91 (∛91): valor exato e decimal