Is 423 a Prime Number?

Is 423 a prime number? Numbers having only 2 factors, i.e. 1 and the number itself are known as prime numbers whereas numbers with more than 2 factors are known as composite. The answer to the question whether 423 is a prime or composite is - "423 is a composite number." Now, let us find out how and why is 423 a prime number or a composite number?

• Is 423 a prime number? - No
• Is 423 a composite number? - Yes
• Is 423 a perfect square? - No
• Factors of 423 - 1, 3, 9, 47, 141, 423
• Prime Factors of 423 - 3, 47

Is 423 a Prime Number?

No, 423 is not a prime number. The number 423 is divisible by 1, 3, 9, 47, 141, 423. For a number to be classified as a prime number, it should have exactly two factors. Since 423 has more than two factors, i.e. 1, 3, 9, 47, 141, 423, it is not a prime number.

Why is 423 not a Prime Number?

To understand whether 423 is composite or prime, it is important to find its factors.

Factors of 423: 1, 3, 9, 47, 141, 423

Since 423 has more than 2 factors, we can say that 423 is not a prime number.

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Is 423 a Composite Number?

Yes, since 423 has more than two factors i.e. 1, 3, 9, 47, 141, 423. In other words, 423 is a composite number because 423 has more than 2 factors.

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Fun Facts:

• Numbers X and Y are said to be coprime if they have only one common factor that is 1.
• A pair of prime numbers X and Y are said to be twin prime numbers if the absolute difference between them is 2. Example - (311, 313) are twin prime numbers.
• A semiprime number is a composite number that is the product of exactly two prime numbers. Example - 115 is semiprime, since 115 can be written as 5 × 23.

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