647545023 has 20 divisors (see below), whose sum is σ = 1018234360. Its totient is φ = 408974832.

The previous prime is 647545007. The next prime is 647545091. The reversal of 647545023 is 320545746.

647545023 is a `hidden beast` number, since 647 + 5 + 4 + 5 + 0 + 2 + 3 = 666.

647545023 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 647545023 - 2⁴ = 647545007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647545123) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 208840 + ... + 211917.

It is an arithmetic number, because the mean of its divisors is an integer number (50911718).

Almost surely, 2^647545023 is an apocalyptic number.

647545023 is a deficient number, since it is larger than the sum of its proper divisors (370689337).

647545023 is a wasteful number, since it uses less digits than its factorization.

647545023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420788 (or 420779 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The square root of 647545023 is about 25446.9059612362. The cubic root of 647545023 is about 865.1471668701.

The spelling of 647545023 in words is "six hundred forty-seven million, five hundred forty-five thousand, twenty-three".