Is 40435579 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 40 435 579 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 40 435 579, the only two divisors are 1 and 40 435 579. Therefore 40 435 579 is a prime number.
As a consequence, 40 435 579 is only a multiple of 1 and 40 435 579.
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Since 40435579 is a prime number, 40435579 is also a deficient number, that is to say 40435579 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 40435579 without 40435579 itself (that is 1, by definition!).