# Is 191 a Prime Number?

Is 191 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 191 is a prime or composite is - * "191 is a prime number."* Now, let us find out how and why is 191 a prime number or a composite number?

**Is 191 a prime number? -**Yes**Is 191 a composite number? -**No**Prime Factors of 191 -**191**Factors of 191 -**1, 191**Is 191 a perfect square? -**No

## Is 191 a Prime Number?

Yes, 191 is a prime number. The number 191 is divisible only by 1 and the number itself. For a number to be classified as a prime number, it should have exactly two factors. Since 191 has exactly two factors, i.e. 1 and 191, it is a prime number.

## How is 191 a Prime Number?

To understand whether 191 is prime or composite, it is important to find its factors.

**Factors of 191:** 1, 191

Therefore, we can say that 191 is a prime number since it has only 2 factors.

## Is 191 a Composite Number?

No, since 191 has only two factors, i.e. 1 and 191. In other words, 191 is not a composite number because 191 doesn’t have more than 2 factors.

**Problem Statements: **

Is 191 a Prime Number? | Yes |

Is 191 a Composite Number? | No |

Is 191 a Perfect Cube? | No |

Square Root of 191 | 13.820275 |

Multiples of 191 | 191, 382, 573, 764, 955, 1146, 1337, 1528, 1719, 1910 |

Is 191 a Perfect Square? | No |

Is 191 an Even Number? | No |

Is 191 an Odd Number? | Yes |

Cube Root of 191 | 5.758955 |

**Fun Facts: **

- All prime numbers don't have the last digit as 5 except the number 5.
- 2 is the smallest prime number.
- A palindrome prime is a prime number that when read in reverse order results in the same number. Examples - 787, 373, 353

**☛ Also Check: **

- Is 43 a Prime Number? - Yes
- Is 4 a Prime Number? - No
- Is 513 a Prime Number? - No
- Is 74 a Prime Number? - No
- Is 449 a Prime Number? - Yes
- Is 65 a Prime Number? - No
- Is 165 a Prime Number? - No
- Is 23 a Prime Number? - Yes

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