Is 1997 a Prime Number?

Is 1997 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 1997 is a prime or composite is - "1997 is a prime number." Now, let us find out how and why is 1997 a prime number or a composite number?

• Is 1997 a prime number? - Yes
• Is 1997 a composite number? - No
• Prime Factors of 1997 - 1997
• Is 1997 a perfect square? - No
• Factors of 1997 - 1, 1997

Is 1997 a Prime Number?

Yes, 1997 is a prime number. The number 1997 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 1997 has exactly two factors, i.e. 1 and 1997, it is a prime number.

How is 1997 a Prime Number?

To understand whether 1997 is composite or prime, it is important to find its factors.

Factors of 1997: 1, 1997

Therefore, we can say that 1997 is a prime number since it has only 2 factors.

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Is 1997 a Composite Number?

No, since 1997 has only two factors, i.e. 1 and 1997. In other words, 1997 is not a composite number because 1997 doesn’t have more than 2 factors.

Problem Statements:

Fun Facts:

• 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.
• All prime numbers don't have the last digit as 5 except the number 5.
• A semiprime number is a composite number that is the product of exactly two prime numbers. Example - 697 is semiprime, since 697 can be written as 17 × 41.

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