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641 is a prime number from 601-700. 641 has 2 factors, 1 and 641. It is the 116th prime number, and the seventh prime number from 601-700. 
641

ProofsEdit

  • Yes — 641 can be divided by 1.
  • No — 641 cannot be divided by 2-640.
  • Yes — 641 can be divided by 641.

Relationship with other odd numbersEdit

The numbers beforeEdit

  • The previous prime number is 631.
    • 637 is divisible by 7, therefore not a prime number.
  • The previous prime number before 631 is 619.
    • 623 is divisible by 7, while 629 is the product of 17 and 37.

The numbers afterEdit

  • The next prime number is 643.
    • There are no odd numbers between 641 and 643. As a result, they are twin primes.
  • 647 is the next prime number after 643.
    • 641 and 647 are six numbers apart; therefore, they are sexy primes.

TriviaEdit

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