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A day full of math games & activities. Find one near you.

Is 243 a Prime Number?

Is 243 a prime number? A prime number is divisible only by 1 and itself, which means it has no other divisor except 1 and the number itself. On the contrary, composite numbers have more than two factors. To determine if 243 is a prime number or composite, we need to divide it with numbers from 1 to 243. To find out the answer to this question "is 243 is a prime number" and to gain a detailed understanding of "how and why is 243 a prime number or a composite number?" Let's learn more.

  • Is 243 a prime number? - No
  • Is 243 a composite number? - Yes
  • Prime Factors of 243 - 3
  • Is 243 a perfect square? - No
  • Factors of 243 - 1, 3, 9, 27, 81, 243

Is 243 a Prime or Composite?

Is 243 a Prime Number?

No, 243 is not a prime number. The number 243 is divisible by 1, 3, 9, 27, 81, 243. For a number to be classified as a prime number, it should have exactly two factors. Since 243 has more than two factors, i.e. 1, 3, 9, 27, 81, 243, it is not a prime number.

Is 243 a Prime Number?

Why is 243 not a Prime Number?

To understand whether 243 is composite or prime, it is important to find its factors.

Factors of 243: 1, 3, 9, 27, 81, 243

Since 243 has more than 2 factors, we can say that 243 is not a prime number.

☛ Prime Number Calculator

Is 243 a Composite Number?

Yes, since 243 has more than two factors i.e. 1, 3, 9, 27, 81, 243. In other words, 243 is a composite number because 243 has more than 2 factors.

Problem Statements:

Is 243 a Prime Number? No
Is 243 a Composite Number? Yes
Multiples of 243 243, 486, 729, 972, 1215, 1458, 1701, 1944, 2187, 2430
Is 243 a Perfect Cube? No
Is 243 an Odd Number? Yes
Square of 243 59049
Is 243 a Perfect Square? No
Is 243 an Even Number? No
Cube Root of 243 6.24024
Square Root of 243 15.588457

Fun Facts:

  • A pair of prime numbers X and Y are said to be twin prime numbers if the absolute difference between them is 2. Example - (311, 313) are twin prime numbers.
  • Numbers X and Y are said to be coprime if they have only one common factor that is 1.
  • A palindrome prime is a prime number that when read in reverse order results in the same number. Examples - 10601, 11311, 12421

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