8664289 has 4 divisors (see below), whose sum is σ = 8712340. Its totient is φ = 8616240.

The previous prime is 8664259. The next prime is 8664311. The reversal of 8664289 is 9824668.

It is a happy number.

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 2822400 + 5841889 = 1680^2 + 2417^2 .

It is a cyclic number.

It is not a de Polignac number, because 8664289 - 2⁹ = 8663777 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8664259) 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, 23754 + ... + 24115.

It is an arithmetic number, because the mean of its divisors is an integer number (2178085).

Almost surely, 2^8664289 is an apocalyptic number.

It is an amenable number.

8664289 is a deficient number, since it is larger than the sum of its proper divisors (48051).

8664289 is a wasteful number, since it uses less digits than its factorization.

8664289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48050.

The product of its digits is 165888, while the sum is 43.

The square root of 8664289 is about 2943.5164344709. The cubic root of 8664289 is about 205.3892189082.

The spelling of 8664289 in words is "eight million, six hundred sixty-four thousand, two hundred eighty-nine".