118565887 has 4 divisors (see below), whose sum is σ = 129344616. Its totient is φ = 107787160.

The previous prime is 118565831. The next prime is 118565933. The reversal of 118565887 is 788565811.

It is a happy number.

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 118565887 - 2¹¹ = 118563839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 118565887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118560887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5389348 + ... + 5389369.

It is an arithmetic number, because the mean of its divisors is an integer number (32336154).

Almost surely, 2^118565887 is an apocalyptic number.

118565887 is a deficient number, since it is larger than the sum of its proper divisors (10778729).

118565887 is a wasteful number, since it uses less digits than its factorization.

118565887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10778728.

The product of its digits is 537600, while the sum is 49.

The square root of 118565887 is about 10888.7963981333. The cubic root of 118565887 is about 491.2696312192.

The spelling of 118565887 in words is "one hundred eighteen million, five hundred sixty-five thousand, eight hundred eighty-seven".