Is 47826721 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 47 826 721 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 47 826 721, the only two divisors are 1 and 47 826 721. Therefore 47 826 721 is a prime number.
As a consequence, 47 826 721 is only a multiple of 1 and 47 826 721.
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Since 47826721 is a prime number, 47826721 is also a deficient number, that is to say 47826721 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 47826721 without 47826721 itself (that is 1, by definition!).