Is 489163981 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 489 163 981 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 489 163 981, the only two divisors are 1 and 489 163 981. Therefore 489 163 981 is a prime number.
As a consequence, 489 163 981 is only a multiple of 1 and 489 163 981.
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Since 489163981 is a prime number, 489163981 is also a deficient number, that is to say 489163981 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 489163981 without 489163981 itself (that is 1, by definition!).
