9664409 has 4 divisors (see below), whose sum is σ = 9715200. Its totient is φ = 9613620.

The previous prime is 9664399. The next prime is 9664411. The reversal of 9664409 is 9044669.

9664409 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9664409 - 2⁸ = 9664153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9664429) 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, 25109 + ... + 25490.

It is an arithmetic number, because the mean of its divisors is an integer number (2428800).

Almost surely, 2^9664409 is an apocalyptic number.

It is an amenable number.

9664409 is a deficient number, since it is larger than the sum of its proper divisors (50791).

9664409 is a wasteful number, since it uses less digits than its factorization.

9664409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50790.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 9664409 is about 3108.7632589182. The cubic root of 9664409 is about 213.0059657274.

The spelling of 9664409 in words is "nine million, six hundred sixty-four thousand, four hundred nine".