Is 19 A Prime Or Composite Number? - Cuemath

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.

☛ Prime Number Calculator

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 n2 + 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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