# 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

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**"how and why is 243 a prime number or a composite number?"****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 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.

## 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.

## 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

**☛ Also Check: **

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