Is 120797749 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 120 797 749 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 120 797 749, the only two divisors are 1 and 120 797 749. Therefore 120 797 749 is a prime number.
As a consequence, 120 797 749 is only a multiple of 1 and 120 797 749.
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Since 120797749 is a prime number, 120797749 is also a deficient number, that is to say 120797749 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 120797749 without 120797749 itself (that is 1, by definition!).