Is 378409349 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 378 409 349 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 378 409 349, the only two divisors are 1 and 378 409 349. Therefore 378 409 349 is a prime number.
As a consequence, 378 409 349 is only a multiple of 1 and 378 409 349.
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Since 378409349 is a prime number, 378409349 is also a deficient number, that is to say 378409349 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 378409349 without 378409349 itself (that is 1, by definition!).