8649889 has 4 divisors (see below), whose sum is σ = 9158724. Its totient is φ = 8141056.

The previous prime is 8649887. The next prime is 8649911. The reversal of 8649889 is 9889468.

8649889 is digitally balanced in base 2, 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 5290000 + 3359889 = 2300^2 + 1833^2 .

It is a cyclic number.

It is not a de Polignac number, because 8649889 - 2¹ = 8649887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8649881) 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, 254392 + ... + 254425.

It is an arithmetic number, because the mean of its divisors is an integer number (2289681).

Almost surely, 2^8649889 is an apocalyptic number.

It is an amenable number.

8649889 is a deficient number, since it is larger than the sum of its proper divisors (508835).

8649889 is a wasteful number, since it uses less digits than its factorization.

8649889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508834.

The product of its digits is 995328, while the sum is 52.

The square root of 8649889 is about 2941.0693633439. The cubic root of 8649889 is about 205.2753705676.

The spelling of 8649889 in words is "eight million, six hundred forty-nine thousand, eight hundred eighty-nine".