117838923 has 4 divisors (see below), whose sum is σ = 157118568. Its totient is φ = 78559280.

The previous prime is 117838921. The next prime is 117838933. The reversal of 117838923 is 329838711.

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

It is a cyclic number.

It is not a de Polignac number, because 117838923 - 2¹ = 117838921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117838921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19639818 + ... + 19639823.

It is an arithmetic number, because the mean of its divisors is an integer number (39279642).

Almost surely, 2^117838923 is an apocalyptic number.

117838923 is a deficient number, since it is larger than the sum of its proper divisors (39279645).

117838923 is an equidigital number, since it uses as much as digits as its factorization.

117838923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39279644.

The product of its digits is 72576, while the sum is 42.

The square root of 117838923 is about 10855.3637893900. The cubic root of 117838923 is about 490.2635303246.

It can be divided in two parts, 11783 and 8923, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 117838923 in words is "one hundred seventeen million, eight hundred thirty-eight thousand, nine hundred twenty-three".