8920865 has 4 divisors (see below), whose sum is σ = 10705044. Its totient is φ = 7136688.

The previous prime is 8920853. The next prime is 8920867. The reversal of 8920865 is 5680298.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 906304 + 8014561 = 952^2 + 2831^2 .

It is a cyclic number.

It is not a de Polignac number, because 8920865 - 2⁸ = 8920609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8920867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892082 + ... + 892091.

It is an arithmetic number, because the mean of its divisors is an integer number (2676261).

Almost surely, 2^8920865 is an apocalyptic number.

It is an amenable number.

8920865 is a deficient number, since it is larger than the sum of its proper divisors (1784179).

8920865 is a wasteful number, since it uses less digits than its factorization.

8920865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784178.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 8920865 is about 2986.7817128140. The cubic root of 8920865 is about 207.3969295046.

The spelling of 8920865 in words is "eight million, nine hundred twenty thousand, eight hundred sixty-five".