118109123 has 4 divisors (see below), whose sum is σ = 128846328. Its totient is φ = 107371920.

The previous prime is 118109119. The next prime is 118109129. The reversal of 118109123 is 321901811.

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 118109123 - 2² = 118109119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 118109092 and 118109101.

It is not an unprimeable number, because it can be changed into a prime (118109129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5368586 + ... + 5368607.

It is an arithmetic number, because the mean of its divisors is an integer number (32211582).

Almost surely, 2^118109123 is an apocalyptic number.

118109123 is a deficient number, since it is larger than the sum of its proper divisors (10737205).

118109123 is a wasteful number, since it uses less digits than its factorization.

118109123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10737204.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 118109123 is about 10867.8021237047. The cubic root of 118109123 is about 490.6379625931.

The spelling of 118109123 in words is "one hundred eighteen million, one hundred nine thousand, one hundred twenty-three".