118809623 has 4 divisors (see below), whose sum is σ = 121051368. Its totient is φ = 116567880.

The previous prime is 118809611. The next prime is 118809629. The reversal of 118809623 is 326908811.

118809623 is nontrivially palindromic in base 16.

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-118809623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118809629) 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, 1120793 + ... + 1120898.

It is an arithmetic number, because the mean of its divisors is an integer number (30262842).

Almost surely, 2^118809623 is an apocalyptic number.

118809623 is a deficient number, since it is larger than the sum of its proper divisors (2241745).

118809623 is an equidigital number, since it uses as much as digits as its factorization.

118809623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241744.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 118809623 is about 10899.9827064083. The cubic root of 118809623 is about 491.6060352825.

The spelling of 118809623 in words is "one hundred eighteen million, eight hundred nine thousand, six hundred twenty-three".