8520999 has 8 divisors (see below), whose sum is σ = 11376240. Its totient is φ = 5673216.

The previous prime is 8520979. The next prime is 8521003. The reversal of 8520999 is 9990258.

8520999 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8520999 - 2¹⁶ = 8455463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8520999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8520929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1879 + ... + 4535.

It is an arithmetic number, because the mean of its divisors is an integer number (1422030).

Almost surely, 2^8520999 is an apocalyptic number.

8520999 is a deficient number, since it is larger than the sum of its proper divisors (2855241).

8520999 is a wasteful number, since it uses less digits than its factorization.

8520999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 8520999 is about 2919.0750247296. The cubic root of 8520999 is about 204.2506770376.

The spelling of 8520999 in words is "eight million, five hundred twenty thousand, nine hundred ninety-nine".