118919817 has 12 divisors (see below), whose sum is σ = 174193344. Its totient is φ = 78162840.

The previous prime is 118919797. The next prime is 118919819. The reversal of 118919817 is 718919811.

It is not a de Polignac number, because 118919817 - 2¹¹ = 118917769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118919819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92413 + ... + 93690.

It is an arithmetic number, because the mean of its divisors is an integer number (14516112).

Almost surely, 2^118919817 is an apocalyptic number.

It is an amenable number.

118919817 is a deficient number, since it is larger than the sum of its proper divisors (55273527).

118919817 is a wasteful number, since it uses less digits than its factorization.

118919817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186180 (or 186177 counting only the distinct ones).

The product of its digits is 36288, while the sum is 45.

The square root of 118919817 is about 10905.0363135571. The cubic root of 118919817 is about 491.7579738623.

The spelling of 118919817 in words is "one hundred eighteen million, nine hundred nineteen thousand, eight hundred seventeen".