864735723 has 8 divisors (see below), whose sum is σ = 1281090000. Its totient is φ = 576490464.

The previous prime is 864735713. The next prime is 864735743. The reversal of 864735723 is 327537468.

864735723 is a `hidden beast` number, since 8 + 6 + 4 + 73 + 572 + 3 = 666.

It is not a de Polignac number, because 864735723 - 2⁵ = 864735691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (864735713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16013598 + ... + 16013651.

It is an arithmetic number, because the mean of its divisors is an integer number (160136250).

Almost surely, 2^864735723 is an apocalyptic number.

864735723 is a deficient number, since it is larger than the sum of its proper divisors (416354277).

864735723 is a wasteful number, since it uses less digits than its factorization.

864735723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32027258 (or 32027252 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 864735723 is about 29406.3891526995. The cubic root of 864735723 is about 952.7108988021.

The spelling of 864735723 in words is "eight hundred sixty-four million, seven hundred thirty-five thousand, seven hundred twenty-three".