9115138723 has 8 divisors (see below), whose sum is σ = 9465523200. Its totient is φ = 8768276040.

The previous prime is 9115138709. The next prime is 9115138733. The reversal of 9115138723 is 3278315119.

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

It is a cyclic number.

It is not a de Polignac number, because 9115138723 - 2⁵ = 9115138691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9115138733) 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, 875173 + ... + 885526.

It is an arithmetic number, because the mean of its divisors is an integer number (1183190400).

Almost surely, 2^9115138723 is an apocalyptic number.

9115138723 is a deficient number, since it is larger than the sum of its proper divisors (350384477).

9115138723 is a wasteful number, since it uses less digits than its factorization.

9115138723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760897.

The product of its digits is 45360, while the sum is 40.

The square root of 9115138723 is about 95473.2356370098. The cubic root of 9115138723 is about 2088.9165666515.

The spelling of 9115138723 in words is "nine billion, one hundred fifteen million, one hundred thirty-eight thousand, seven hundred twenty-three".