Is 133 a Prime Number?

Is 133 a prime number? How do you know that 133 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 133? Is 133 a prime number? "No, 133 is not a prime number." Since 133 has more than 2 factors i.e. 1, 7, 19, 133, it is a composite number. Let's study this in detail.

• Is 133 a prime number? - No
• Is 133 a composite number? - Yes
• Factors of 133 - 1, 7, 19, 133
• Is 133 a perfect square? - No
• Prime Factors of 133 - 7, 19

Is 133 a Prime Number?

No, 133 is not a prime number. The number 133 is divisible by 1, 7, 19, 133. For a number to be classified as a prime number, it should have exactly two factors. Since 133 has more than two factors, i.e. 1, 7, 19, 133, it is not a prime number.

Why is 133 not a Prime Number?

To understand whether 133 is composite or prime, it is important to find its factors.

Factors of 133: 1, 7, 19, 133

Since 133 has more than 2 factors, we can say that 133 is not a prime number.

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Is 133 a Composite Number?

Yes, since 133 has more than two factors i.e. 1, 7, 19, 133. In other words, 133 is a composite number because 133 has more than 2 factors.

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Fun Facts:

• A perfect square (square number) is always a composite number.
• 1 is neither prime nor composite.
• 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

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