647875459 has 16 divisors (see below), whose sum is σ = 815592960. Its totient is φ = 499930560.

The previous prime is 647875441. The next prime is 647875489. The reversal of 647875459 is 954578746.

It is a cyclic number.

It is not a de Polignac number, because 647875459 - 2¹⁹ = 647351171 is a prime.

It is a super-2 number, since 2×647875459² = 839485220748921362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (647875429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32914 + ... + 48775.

It is an arithmetic number, because the mean of its divisors is an integer number (50974560).

Almost surely, 2^647875459 is an apocalyptic number.

647875459 is a deficient number, since it is larger than the sum of its proper divisors (167717501).

647875459 is a wasteful number, since it uses less digits than its factorization.

647875459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81810.

The product of its digits is 8467200, while the sum is 55.

The square root of 647875459 is about 25453.3977889004. The cubic root of 647875459 is about 865.2943006066.

The spelling of 647875459 in words is "six hundred forty-seven million, eight hundred seventy-five thousand, four hundred fifty-nine".