Is 972788987 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 972 788 987 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 972 788 987, the only two divisors are 1 and 972 788 987. Therefore 972 788 987 is a prime number.
As a consequence, 972 788 987 is only a multiple of 1 and 972 788 987.
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Since 972788987 is a prime number, 972788987 is also a deficient number, that is to say 972788987 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 972788987 without 972788987 itself (that is 1, by definition!).