Is 189 a Prime Number?

Is 189 a prime number? A prime number is divisible only by 1 and itself, which means it has no other divisor except 1 and the number itself. On the contrary, composite numbers have more than two factors. To determine if 189 is a prime number or composite, we need to divide it with numbers from 1 to 189. To find out the answer to this question "is 189 is a prime number" and to gain a detailed understanding of "how and why is 189 a prime number or a composite number?" Let's learn more.

• Is 189 a prime number? - No
• Is 189 a composite number? - Yes
• Is 189 a perfect square? - No
• Factors of 189 - 1, 3, 7, 9, 21, 27, 63, 189
• Prime Factors of 189 - 3, 7

Is 189 a Prime Number?

No, 189 is not a prime number. The number 189 is divisible by 1, 3, 7, 9, 21, 27, 63, 189. For a number to be classified as a prime number, it should have exactly two factors. Since 189 has more than two factors, i.e. 1, 3, 7, 9, 21, 27, 63, 189, it is not a prime number.

Why is 189 not a Prime Number?

To understand whether 189 is composite or prime, it is important to find its factors.

Factors of 189: 1, 3, 7, 9, 21, 27, 63, 189

Since 189 has more than 2 factors, we can say that 189 is not a prime number.

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Is 189 a Composite Number?

Yes, since 189 has more than two factors i.e. 1, 3, 7, 9, 21, 27, 63, 189. In other words, 189 is a composite number because 189 has more than 2 factors.

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Fun Facts:

• Prime numbers greater than 5 can be represented in the form of either 6n + 1 or 6n - 1. Example - 71 is a prime number and it can be written as 71 = 6 × 12 - 1
• 1 is neither prime nor composite.
• All primes except 2 are odd.

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