647345475 has 36 divisors (see below), whose sum is σ = 1325109136. Its totient is φ = 295928640.

The previous prime is 647345471. The next prime is 647345483. The reversal of 647345475 is 574543746.

647345475 is a `hidden beast` number, since 64 + 73 + 454 + 75 = 666.

647345475 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 647345475 - 2² = 647345471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 647345475.

It is not an unprimeable number, because it can be changed into a prime (647345471) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 203932 + ... + 207081.

Almost surely, 2^647345475 is an apocalyptic number.

647345475 is an abundant number, since it is smaller than the sum of its proper divisors (677763661).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647345475 is a wasteful number, since it uses less digits than its factorization.

647345475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411036 (or 411028 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 45.

The square root of 647345475 is about 25442.9847895250. The cubic root of 647345475 is about 865.0582895888.

The spelling of 647345475 in words is "six hundred forty-seven million, three hundred forty-five thousand, four hundred seventy-five".