8563906 has 16 divisors (see below), whose sum is σ = 13923000. Its totient is φ = 3950544.

The previous prime is 8563901. The next prime is 8563939. The reversal of 8563906 is 6093658.

It can be written as a sum of positive squares in 4 ways, for example, as 1083681 + 7480225 = 1041^2 + 2735^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (8563901) 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, 3420 + ... + 5368.

Almost surely, 2^8563906 is an apocalyptic number.

8563906 is a deficient number, since it is larger than the sum of its proper divisors (5359094).

8563906 is a wasteful number, since it uses less digits than its factorization.

8563906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990 (or 1964 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 8563906 is about 2926.4152131917. The cubic root of 8563906 is about 204.5929340496.

The spelling of 8563906 in words is "eight million, five hundred sixty-three thousand, nine hundred six".