Q:

Is 19 a Prime Number?

A:

Quick Answer

The number 19 is the eighth prime number. A prime number is a positive, whole number that is only divisible by one and itself. Nineteen is also the seventh Mersenne prime exponent, which is a prime number that is one less than a power of two.

Continue Reading

Full Answer

Out of the first 100 numbers, 25 of them are prime numbers. The opposite of a prime number is a composite number. Because all even numbers are divisible by two, the number two is the only even prime number. Similarly, no prime numbers that are higher than five end in five. One is a unique number because it is neither a prime number nor a composite number.

Learn more about Numbers

Related Questions

  • Q:

    Is 29 a Prime Number?

    A: Twenty-nine is a prime number, as its only divisors are 1 and 29. A prime number is defined as a whole number that is greater than 1 and is not evenly divi... Full Answer >
    Filed Under:
  • Q:

    Is 101 a Prime Number?

    A: Since it is only divisible by 1 and itself, 101 is a prime number. Primes are whole numbers greater than 1 with no other divisors but 1 and their whole val... Full Answer >
    Filed Under:
  • Q:

    Is 63 a Prime Number?

    A: Sixty-three is not a prime number. Sixty-three is classified as a composite number because it has divisors, and can be composed of other numbers than numbe... Full Answer >
    Filed Under:
  • Q:

    Is "0" a Prime Number?

    A: The number zero is not a prime number. By definition, a prime number dictates that the number must be a whole number greater in value than one and must be ... Full Answer >
    Filed Under:

Explore