8664909 has 16 divisors (see below), whose sum is σ = 12794880. Its totient is φ = 5171760.

The previous prime is 8664907. The next prime is 8664941. The reversal of 8664909 is 9094668.

It is not a de Polignac number, because 8664909 - 2¹ = 8664907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8664907) 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 15 ways as a sum of consecutive naturals, for example, 252 + ... + 4170.

It is an arithmetic number, because the mean of its divisors is an integer number (799680).

Almost surely, 2^8664909 is an apocalyptic number.

It is an amenable number.

8664909 is a deficient number, since it is larger than the sum of its proper divisors (4129971).

8664909 is a wasteful number, since it uses less digits than its factorization.

8664909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 8664909 is about 2943.6217487986. The cubic root of 8664909 is about 205.3941178783.

It can be divided in two parts, 866 and 4909, that added together give a palindrome (5775).

The spelling of 8664909 in words is "eight million, six hundred sixty-four thousand, nine hundred nine".