9 to the power of 2 (9²) equals 81. This means 9 x 9 = 81. Result has 2 digits, prime factorisation 3 x 3 x 3 x 3....
9 TO THE POWER OF 2
81
9² = 9 × 9 = 81
Value
81
Base
9
Exponent
2
Number of digits
2
Digit sum
9
Even or odd?
Odd
Divisible by 10?
No
Perfect square?
Yes ✓
STEP-BY-STEP
9² means multiply 9 by itself 2 times
9
9 × 9 = 81
9² = 81
PRIME FACTORISATION
81 = 3 × 3 × 3 × 3
= 9² (all factors are 9)
SAME VALUE — OTHER BASES
3⁴ = 81
FUN FACT
81 equals 3 to the 4. A Sudoku grid has 81 cells.
POWERS OF 9 (1 → 2)
ALL POWERS OF 9 (1–10)
EXPONENT LAWS
9² means multiply 9 by itself 2 times.
Multiplication chain: 9 x 9 = 81.
The result is 81 - 2 digits, prime factorisation: 3 x 3 x 3 x 3.
Check: 9¹ x 9 = 9 x 9 = 81.
9² = 9 x 9 = 81. Digits: 2. Prime factors: 3 x 3 x 3 x 3. Also: 3⁴ = 81.
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Last updated: April 28, 2026 · Verified by EagleCalculator team · Eagle-eyed accuracy for every calculation.