647430057 has 32 divisors (see below), whose sum is σ = 1040376960. Its totient is φ = 396311040.

The previous prime is 647430053. The next prime is 647430067. The reversal of 647430057 is 750034746.

647430057 is a `hidden beast` number, since 647 + 4 + 3 + 0 + 0 + 5 + 7 = 666.

It is not a de Polignac number, because 647430057 - 2² = 647430053 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (647430053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1618 + ... + 36020.

It is an arithmetic number, because the mean of its divisors is an integer number (32511780).

Almost surely, 2^647430057 is an apocalyptic number.

It is an amenable number.

647430057 is a deficient number, since it is larger than the sum of its proper divisors (392946903).

647430057 is a wasteful number, since it uses less digits than its factorization.

647430057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34470 (or 34464 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The square root of 647430057 is about 25444.6469222900. The cubic root of 647430057 is about 865.0959640489.

The spelling of 647430057 in words is "six hundred forty-seven million, four hundred thirty thousand, fifty-seven".