# Is 78 a Prime Number?

Is 78 a prime number? Numbers having only 2 factors, i.e. 1 and the number itself are known as prime numbers whereas numbers with more than 2 factors are known as composite. The answer to the question whether 78 is a prime or composite is - * "78 is a composite number."* Now, let us find out how and why is 78 a prime number or a composite number?

**Is 78 a prime number? -**No**Is 78 a composite number? -**Yes**Is 78 a perfect square? -**No**Factors of 78 -**1, 2, 3, 6, 13, 26, 39, 78**Prime Factors of 78 -**2, 3, 13

## Is 78 a Prime Number?

No, 78 is not a prime number. The number 78 is divisible by 1, 2, 3, 6, 13, 26, 39, 78. For a number to be classified as a prime number, it should have exactly two factors. Since 78 has more than two factors, i.e. 1, 2, 3, 6, 13, 26, 39, 78, it is not a prime number.

## Why is 78 not a Prime Number?

To understand whether 78 is prime or composite, it is important to find its factors.

**Factors of 78:** 1, 2, 3, 6, 13, 26, 39, 78

Since 78 has more than 2 factors, we can say that 78 is not a prime number.

## Is 78 a Composite Number?

Yes, since 78 has more than two factors i.e. 1, 2, 3, 6, 13, 26, 39, 78. In other words, 78 is a composite number because 78 has more than 2 factors.

**Problem Statements: **

Is 78 a Prime Number? | No |

Is 78 a Composite Number? | Yes |

Is 78 a Perfect Square? | No |

Cube Root of 78 | 4.272652 |

Square Root of 78 | 8.831761 |

Multiples of 78 | 78, 156, 234, 312, 390, 468, 546, 624, 702, 780 |

Is 78 an Even Number? | Yes |

Is 78 a Perfect Cube? | No |

Is 78 an Odd Number? | No |

Square of 78 | 6084 |

**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.
- 2 is the smallest prime number.
- A perfect square (square number) is always a composite number.

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