8520889 has 4 divisors (see below), whose sum is σ = 9176356. Its totient is φ = 7865424.

The previous prime is 8520887. The next prime is 8520901. The reversal of 8520889 is 9880258.

It is a happy number.

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 652864 + 7868025 = 808^2 + 2805^2 .

It is a cyclic number.

It is not a de Polignac number, because 8520889 - 2¹ = 8520887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8520887) 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, 327714 + ... + 327739.

It is an arithmetic number, because the mean of its divisors is an integer number (2294089).

Almost surely, 2^8520889 is an apocalyptic number.

It is an amenable number.

8520889 is a deficient number, since it is larger than the sum of its proper divisors (655467).

8520889 is a wasteful number, since it uses less digits than its factorization.

8520889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655466.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 8520889 is about 2919.0561830838. The cubic root of 8520889 is about 204.2497981238.

It can be divided in two parts, 8520 and 889, that added together give a square (9409 = 97²).

The spelling of 8520889 in words is "eight million, five hundred twenty thousand, eight hundred eighty-nine".