117731923 has 4 divisors (see below), whose sum is σ = 123928360. Its totient is φ = 111535488.

The previous prime is 117731897. The next prime is 117731941. The reversal of 117731923 is 329137711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117731923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117731983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3098190 + ... + 3098227.

It is an arithmetic number, because the mean of its divisors is an integer number (30982090).

Almost surely, 2^117731923 is an apocalyptic number.

117731923 is a deficient number, since it is larger than the sum of its proper divisors (6196437).

117731923 is an equidigital number, since it uses as much as digits as its factorization.

117731923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6196436.

The product of its digits is 7938, while the sum is 34.

The square root of 117731923 is about 10850.4342309421. The cubic root of 117731923 is about 490.1150958286.

The spelling of 117731923 in words is "one hundred seventeen million, seven hundred thirty-one thousand, nine hundred twenty-three".