Is 137874557 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 137 874 557 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 137 874 557, the only two divisors are 1 and 137 874 557. Therefore 137 874 557 is a prime number.
As a consequence, 137 874 557 is only a multiple of 1 and 137 874 557.
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Since 137874557 is a prime number, 137874557 is also a deficient number, that is to say 137874557 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 137874557 without 137874557 itself (that is 1, by definition!).