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Is this a prime number? 6395271Yes or No???

Sagot :

It is required to determine if the number is a prime number or not.

Recall that prime numbers are the numbers greater than 1 that are only divisible by themselves and 1.

Recall also the Divisibility Rule for 3: Divisibility rule for 3 states that a number is completely divisible by 3 if the sum of its digits is divisible by 3.

The given number is 6395271.

The sum of the digits is:

[tex]6+3+9+5+2+7+1=33[/tex]

Notice that the sum, 33 is divisible by 3.

Hence, by the divisible rule for 3, it follows that the number 6395271 is divisible by 3.

Since the number is divisible by 3, it implies that the number is not a prime number.

No, the number is not a prime number.

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