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# Is 691 a Prime Number?

Is 691 a prime number? If a number has only two factors, i.e. 1 and the number itself, it is known as a prime number. In contrast, composite numbers have more than two factors. By this explanation, can we answer the question - is 691 a prime number? According to the definition mentioned above, we can say * "yes, 691 is a prime number."* Now let us take a look at the detailed solution of why is 691 a prime number?

**Is 691 a prime number? -**Yes**Is 691 a composite number? -**No**Factors of 691 -**1, 691**Prime Factors of 691 -**691**Is 691 a perfect square? -**No

## Is 691 a Prime Number?

Yes, 691 is a prime number. The number 691 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 691 has exactly two factors, i.e. 1 and 691, it is a prime number.

## How is 691 a Prime Number?

To understand whether 691 is prime or composite, it is important to find its factors.

**Factors of 691:** 1, 691

Therefore, we can say that 691 is a prime number since it has only 2 factors.

## Is 691 a Composite Number?

No, since 691 has only two factors, i.e. 1 and 691. In other words, 691 is not a composite number because 691 doesn’t have more than 2 factors.

**Problem Statements: **

Is 691 a Prime Number? | Yes |

Is 691 a Composite Number? | No |

Square Root of 691 | 26.286879 |

Is 691 a Perfect Square? | No |

Is 691 an Odd Number? | Yes |

Multiples of 691 | 691, 1382, 2073, 2764, 3455, 4146, 4837, 5528, 6219, 6910 |

Cube Root of 691 | 8.840803 |

Is 691 a Perfect Cube? | No |

Is 691 an Even Number? | No |

**Fun Facts: **

- A semiprime number is a composite number that is the product of exactly two prime numbers. Example - 697 is semiprime, since 697 can be written as 17 × 41.
- All primes except 2 are odd.
- 2 is the smallest prime number.

**☛ Also Check: **

- Is 27 a Prime Number? - No
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- Is 29 a Prime Number? - Yes
- Is 40 a Prime Number? - No
- Is 259 a Prime Number? - No
- Is 491 a Prime Number? - Yes

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