# Is 19 a Prime Number?

Is 19 a prime number? How do you know that 19 is prime or composite? Let us first understand what makes a number 'prime'. If a number has only 2 factors (1 and the number itself), then it is a prime number. If the number has more than 2 factors, then it is composite. Now, what do you think of 19? Is 19 a prime number? * "Yes, 19 is a prime number."* Since 19 has only 2 factors i.e. 1 and 19, it is a prime number. Let's study this in detail.

**Is 19 a prime number? -**Yes**Is 19 a composite number? -**No**Factors of 19 -**1, 19**Is 19 a perfect square? -**No**Prime Factors of 19 -**19

## Is 19 a Prime Number?

Yes, 19 is a prime number. The number 19 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 19 has exactly two factors, i.e. 1 and 19, it is a prime number.

## How is 19 a Prime Number?

To understand whether 19 is composite or prime, it is important to find its factors.

**Factors of 19:** 1, 19

Therefore, we can say that 19 is a prime number since it has only 2 factors.

## Is 19 a Composite Number?

No, since 19 has only two factors, i.e. 1 and 19. In other words, 19 is not a composite number because 19 doesn’t have more than 2 factors.

**Problem Statements: **

Is 19 a Prime Number? | Yes |

Is 19 a Composite Number? | No |

Multiples of 19 | 19, 38, 57, 76, 95, 114, 133, 152, 171, 190 |

Is 19 a Perfect Square? | No |

Is 19 an Odd Number? | Yes |

Is 19 a Perfect Cube? | No |

Cube Root of 19 | 2.668399 |

Is 19 an Even Number? | No |

Square Root of 19 | 4.358899 |

**Fun Facts: **

- 1 is neither prime nor composite.
- Euler discovered a polynomial n
^{2}+ n + 41 that produces prime numbers for values of n that lie between 0 and 39 inclusive. It can generate 40 prime numbers for 0 <= n <= 39. - A palindrome prime is a prime number that when read in reverse order results in the same number. Examples - 787, 373, 353

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- Is 37 a Prime Number? - Yes
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- Is 129 a Prime Number? - No
- Is 88 a Prime Number? - No