Is 42430867 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 42 430 867 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 42 430 867, the only two divisors are 1 and 42 430 867. Therefore 42 430 867 is a prime number.
As a consequence, 42 430 867 is only a multiple of 1 and 42 430 867.
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Since 42430867 is a prime number, 42430867 is also a deficient number, that is to say 42430867 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 42430867 without 42430867 itself (that is 1, by definition!).