118239923 has 4 divisors (see below), whose sum is σ = 119286408. Its totient is φ = 117193440.

The previous prime is 118239911. The next prime is 118239929. The reversal of 118239923 is 329932811.

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 118239923 - 2¹² = 118235827 is a prime.

It is a super-5 number, since 5×118239923⁵ (a number of 42 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118239929) 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, 523073 + ... + 523298.

It is an arithmetic number, because the mean of its divisors is an integer number (29821602).

Almost surely, 2^118239923 is an apocalyptic number.

118239923 is a deficient number, since it is larger than the sum of its proper divisors (1046485).

118239923 is a wasteful number, since it uses less digits than its factorization.

118239923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046484.

The product of its digits is 23328, while the sum is 38.

The square root of 118239923 is about 10873.8182346405. The cubic root of 118239923 is about 490.8190148496.

The spelling of 118239923 in words is "one hundred eighteen million, two hundred thirty-nine thousand, nine hundred twenty-three".