Is 509729771 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 509 729 771 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 509 729 771, the only two divisors are 1 and 509 729 771. Therefore 509 729 771 is a prime number.
As a consequence, 509 729 771 is only a multiple of 1 and 509 729 771.
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Since 509729771 is a prime number, 509729771 is also a deficient number, that is to say 509729771 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 509729771 without 509729771 itself (that is 1, by definition!).