9664559 has 4 divisors (see below), whose sum is σ = 10173240. Its totient is φ = 9155880.

The previous prime is 9664553. The next prime is 9664579. The reversal of 9664559 is 9554669.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9554669 = 67 ⋅142607.

It is a cyclic number.

It is not a de Polignac number, because 9664559 - 2¹² = 9660463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9664553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254312 + ... + 254349.

It is an arithmetic number, because the mean of its divisors is an integer number (2543310).

Almost surely, 2^9664559 is an apocalyptic number.

9664559 is a deficient number, since it is larger than the sum of its proper divisors (508681).

9664559 is a wasteful number, since it uses less digits than its factorization.

9664559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508680.

The product of its digits is 291600, while the sum is 44.

The square root of 9664559 is about 3108.7873841741. The cubic root of 9664559 is about 213.0070677341.

The spelling of 9664559 in words is "nine million, six hundred sixty-four thousand, five hundred fifty-nine".