8564649 has 32 divisors (see below), whose sum is σ = 12840960. Its totient is φ = 5054400.

The previous prime is 8564597. The next prime is 8564653. The reversal of 8564649 is 9464658.

8564649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8564649 - 2¹⁵ = 8531881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8564649.

It is not an unprimeable number, because it can be changed into a prime (8564749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65314 + ... + 65444.

It is an arithmetic number, because the mean of its divisors is an integer number (401280).

Almost surely, 2^8564649 is an apocalyptic number.

It is an amenable number.

8564649 is a deficient number, since it is larger than the sum of its proper divisors (4276311).

8564649 is a wasteful number, since it uses less digits than its factorization.

8564649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221.

The product of its digits is 207360, while the sum is 42.

The square root of 8564649 is about 2926.5421575641. The cubic root of 8564649 is about 204.5988506704.

Subtracting 8564649 from its reverse (9464658), we obtain a palindrome (900009).

The spelling of 8564649 in words is "eight million, five hundred sixty-four thousand, six hundred forty-nine".