8563913 has 4 divisors (see below), whose sum is σ = 8601540. Its totient is φ = 8526288.

The previous prime is 8563901. The next prime is 8563939. The reversal of 8563913 is 3193658.

8563913 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 5508409 + 3055504 = 2347^2 + 1748^2 .

It is a cyclic number.

It is not a de Polignac number, because 8563913 - 2²⁰ = 7515337 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8566913) 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, 18470 + ... + 18927.

It is an arithmetic number, because the mean of its divisors is an integer number (2150385).

Almost surely, 2^8563913 is an apocalyptic number.

It is an amenable number.

8563913 is a deficient number, since it is larger than the sum of its proper divisors (37627).

8563913 is a wasteful number, since it uses less digits than its factorization.

8563913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37626.

The product of its digits is 19440, while the sum is 35.

The square root of 8563913 is about 2926.4164091940. The cubic root of 8563913 is about 204.5929897932.

The spelling of 8563913 in words is "eight million, five hundred sixty-three thousand, nine hundred thirteen".