Is 77408039 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 77 408 039 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 77 408 039, the only two divisors are 1 and 77 408 039. Therefore 77 408 039 is a prime number.
As a consequence, 77 408 039 is only a multiple of 1 and 77 408 039.
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Since 77408039 is a prime number, 77408039 is also a deficient number, that is to say 77408039 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 77408039 without 77408039 itself (that is 1, by definition!).