Is 42090319 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 42 090 319 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 42 090 319, the only two divisors are 1 and 42 090 319. Therefore 42 090 319 is a prime number.
As a consequence, 42 090 319 is only a multiple of 1 and 42 090 319.
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Since 42090319 is a prime number, 42090319 is also a deficient number, that is to say 42090319 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 42090319 without 42090319 itself (that is 1, by definition!).