9664439 has 4 divisors (see below), whose sum is σ = 10084656. Its totient is φ = 9244224.

The previous prime is 9664429. The next prime is 9664451. The reversal of 9664439 is 9344669.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9344669 = 2657 ⋅3517.

It is a cyclic number.

It is not a de Polignac number, because 9664439 - 2⁴ = 9664423 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9664396 and 9664405.

It is a congruent 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, 210074 + ... + 210119.

It is an arithmetic number, because the mean of its divisors is an integer number (2521164).

Almost surely, 2^9664439 is an apocalyptic number.

9664439 is a deficient number, since it is larger than the sum of its proper divisors (420217).

9664439 is a wasteful number, since it uses less digits than its factorization.

9664439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420216.

The product of its digits is 139968, while the sum is 41.

The square root of 9664439 is about 3108.7680839844. The cubic root of 9664439 is about 213.0061861296.

The spelling of 9664439 in words is "nine million, six hundred sixty-four thousand, four hundred thirty-nine".