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Is 491 a Prime Number?

Is 491 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 491 is a prime or composite is - "491 is a prime number." Now, let us find out how and why is 491 a prime number or a composite number?

Is 491 a prime number? - Yes
Is 491 a composite number? - No
Is 491 a perfect square? - No
Factors of 491 - 1, 491
Prime Factors of 491 - 491

Yes, 491 is a prime number. The number 491 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 491 has exactly two factors, i.e. 1 and 491, it is a prime number.

Is 491 a Prime or Composite?

How is 491 a Prime Number?

To understand whether 491 is prime or composite, it is important to find its factors.

Factors of 491: 1, 491

Therefore, we can say that 491 is a prime number since it has only 2 factors.

☛ Prime Number Calculator

Is 491 a Composite Number?

No, since 491 has only two factors, i.e. 1 and 491. In other words, 491 is not a composite number because 491 doesn’t have more than 2 factors.

Problem Statements:

Is 491 a Prime Number?	Yes
Is 491 a Composite Number?	No
Is 491 an Odd Number?	Yes
Is 491 an Even Number?	No
Square Root of 491	22.158520
Multiples of 491	491, 982, 1473, 1964, 2455, 2946, 3437, 3928, 4419, 4910
Is 491 a Perfect Cube?	No
Cube Root of 491	7.889078
Is 491 a Perfect Square?	No

Fun Facts:

Numbers X and Y are said to be coprime if they have only one common factor that is 1.
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 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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