8668909 has 4 divisors (see below), whose sum is σ = 8675100. Its totient is φ = 8662720.

The previous prime is 8668901. The next prime is 8668951. The reversal of 8668909 is 9098668.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5616900 + 3052009 = 2370^2 + 1747^2 .

It is a cyclic number.

It is not a de Polignac number, because 8668909 - 2³ = 8668901 is a prime.

It is a Duffinian number.

8668909 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8668901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117 + ... + 4165.

It is an arithmetic number, because the mean of its divisors is an integer number (2168775).

Almost surely, 2^8668909 is an apocalyptic number.

It is an amenable number.

8668909 is a deficient number, since it is larger than the sum of its proper divisors (6191).

8668909 is a wasteful number, since it uses less digits than its factorization.

8668909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6190.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 8668909 is about 2944.3011055257. The cubic root of 8668909 is about 205.4257185211.

The spelling of 8668909 in words is "eight million, six hundred sixty-eight thousand, nine hundred nine".