MathQuarryCalculators

Primes / Is 243 prime?

Is 243 a Prime Number?

No243 = 3^5

243 is NOT prime: 3 × 81 = 243. That makes 3 a genuine divisor of 243 beyond 1 and 243 itself. Fully broken down, 243 = 3^5, for 6 divisors total. 243 sits between primes 241 and 251, 2 below and 8 above. 243: 3, 9 divide 243 evenly, checked against 2-12. 243 is odd, digit sum 9 for 243, digital root 9 for 243. 243 has 4 primes within 10 of 243.

Factors
1, 3, 9, 27, 81, 243
Number of factors
6
Prime?
No
Prime factorization
3^5
Even or odd
Odd
Square
59049
Cube
14348907
Binary
11110011
Hexadecimal
F3
Roman numeral
CCXLIII
Perfect square?
No
Perfect cube?
No
Perfect number?
No
Triangular number?
No
Fibonacci number?
No
Full facts for 243 →Factors of 243 →