921113865 has 24 divisors (see below), whose sum is σ = 1824683328. Its totient is φ = 421080480.

The previous prime is 921113857. The next prime is 921113911. The reversal of 921113865 is 568311129.

921113865 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 921113865 - 2³ = 921113857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1461771 + ... + 1462400.

It is an arithmetic number, because the mean of its divisors is an integer number (76028472).

Almost surely, 2^921113865 is an apocalyptic number.

It is an amenable number.

921113865 is a deficient number, since it is larger than the sum of its proper divisors (903569463).

921113865 is a wasteful number, since it uses less digits than its factorization.

921113865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2924189 (or 2924186 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 921113865 is about 30349.8577426650. The cubic root of 921113865 is about 972.9811797484.

The spelling of 921113865 in words is "nine hundred twenty-one million, one hundred thirteen thousand, eight hundred sixty-five".