8649686 has 4 divisors (see below), whose sum is σ = 12974532. Its totient is φ = 4324842.

The previous prime is 8649677. The next prime is 8649689. The reversal of 8649686 is 6869468.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 8649686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8649689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2162420 + ... + 2162423.

It is an arithmetic number, because the mean of its divisors is an integer number (3243633).

Almost surely, 2^8649686 is an apocalyptic number.

8649686 is a deficient number, since it is larger than the sum of its proper divisors (4324846).

8649686 is a wasteful number, since it uses less digits than its factorization.

8649686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4324845.

The product of its digits is 497664, while the sum is 47.

The square root of 8649686 is about 2941.0348518846. The cubic root of 8649686 is about 205.2737647194.

The spelling of 8649686 in words is "eight million, six hundred forty-nine thousand, six hundred eighty-six".