Is 429318389 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 429 318 389 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 429 318 389, the only two divisors are 1 and 429 318 389. Therefore 429 318 389 is a prime number.
As a consequence, 429 318 389 is only a multiple of 1 and 429 318 389.
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Since 429318389 is a prime number, 429318389 is also a deficient number, that is to say 429318389 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 429318389 without 429318389 itself (that is 1, by definition!).