Is 67428167 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 67 428 167 is a prime number.
Indeed, the definition of a prime numbers is to have exactly two distinct positive divisors, 1 and itself. A number is a divisor of another number when the remainder of Euclid’s division of the second one by the first one is zero. Concerning the number 67 428 167, the only two divisors are 1 and 67 428 167. Therefore 67 428 167 is a prime number.
As a consequence, 67 428 167 is only a multiple of 1 and 67 428 167.
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Since 67428167 is a prime number, 67428167 is also a deficient number, that is to say 67428167 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 67428167 without 67428167 itself (that is 1, by definition!).