118471805 has 4 divisors (see below), whose sum is σ = 142166172. Its totient is φ = 94777440.

The previous prime is 118471789. The next prime is 118471811. The reversal of 118471805 is 508174811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508174811 = 23 ⋅22094557.

It can be written as a sum of positive squares in 2 ways, for example, as 63904036 + 54567769 = 7994^2 + 7387^2 .

It is not a de Polignac number, because 118471805 - 2⁴ = 118471789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11847176 + ... + 11847185.

It is an arithmetic number, because the mean of its divisors is an integer number (35541543).

Almost surely, 2^118471805 is an apocalyptic number.

It is an amenable number.

118471805 is a deficient number, since it is larger than the sum of its proper divisors (23694367).

118471805 is an equidigital number, since it uses as much as digits as its factorization.

118471805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23694366.

The product of its (nonzero) digits is 8960, while the sum is 35.

The square root of 118471805 is about 10884.4754122558. The cubic root of 118471805 is about 491.1396560605.

The spelling of 118471805 in words is "one hundred eighteen million, four hundred seventy-one thousand, eight hundred five".