8638320723 has 8 divisors (see below), whose sum is σ = 11518416336. Its totient is φ = 5758552800.

The previous prime is 8638320701. The next prime is 8638320731. The reversal of 8638320723 is 3270238368.

8638320723 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8638320723 - 2²⁴ = 8621543507 is a prime.

It is a super-2 number, since 2×8638320723² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8638320923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11848 + ... + 131973.

It is an arithmetic number, because the mean of its divisors is an integer number (1439802042).

Almost surely, 2^8638320723 is an apocalyptic number.

8638320723 is a deficient number, since it is larger than the sum of its proper divisors (2880095613).

8638320723 is a wasteful number, since it uses less digits than its factorization.

8638320723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163845.

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 8638320723 is about 92942.5667979963. The cubic root of 8638320723 is about 2051.8381865058.

The spelling of 8638320723 in words is "eight billion, six hundred thirty-eight million, three hundred twenty thousand, seven hundred twenty-three".