Is 40178993 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 40 178 993 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 40 178 993, the only two divisors are 1 and 40 178 993. Therefore 40 178 993 is a prime number.
As a consequence, 40 178 993 is only a multiple of 1 and 40 178 993.
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Since 40178993 is a prime number, 40178993 is also a deficient number, that is to say 40178993 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 40178993 without 40178993 itself (that is 1, by definition!).