918821113 has 12 divisors (see below), whose sum is σ = 1064199040. Its totient is φ = 776988576.

The previous prime is 918821093. The next prime is 918821129. The reversal of 918821113 is 311128819.

It is a happy number.

918821113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 918821113 - 2⁵ = 918821081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (918821173) 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, 712173 + ... + 713461.

Almost surely, 2^918821113 is an apocalyptic number.

It is an amenable number.

918821113 is a deficient number, since it is larger than the sum of its proper divisors (145377927).

918821113 is an frugal number, since it uses more digits than its factorization.

918821113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2664 (or 1375 counting only the distinct ones).

The product of its digits is 3456, while the sum is 34.

The square root of 918821113 is about 30312.0621700339. The cubic root of 918821113 is about 972.1732238959.

The spelling of 918821113 in words is "nine hundred eighteen million, eight hundred twenty-one thousand, one hundred thirteen".