Is 40435243 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 40 435 243 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 40 435 243, the only two divisors are 1 and 40 435 243. Therefore 40 435 243 is a prime number.
As a consequence, 40 435 243 is only a multiple of 1 and 40 435 243.
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Since 40435243 is a prime number, 40435243 is also a deficient number, that is to say 40435243 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 40435243 without 40435243 itself (that is 1, by definition!).