Is 438902479 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 438 902 479 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 438 902 479, the only two divisors are 1 and 438 902 479. Therefore 438 902 479 is a prime number.
As a consequence, 438 902 479 is only a multiple of 1 and 438 902 479.
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Since 438902479 is a prime number, 438902479 is also a deficient number, that is to say 438902479 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 438902479 without 438902479 itself (that is 1, by definition!).