9664709 has 4 divisors (see below), whose sum is σ = 9847116. Its totient is φ = 9482304.

The previous prime is 9664693. The next prime is 9664717. The reversal of 9664709 is 9074669.

9664709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9074669 = 311 ⋅29179.

It can be written as a sum of positive squares in 2 ways, for example, as 7480225 + 2184484 = 2735^2 + 1478^2 .

It is a cyclic number.

It is not a de Polignac number, because 9664709 - 2⁴ = 9664693 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 (9664729) 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, 91124 + ... + 91229.

It is an arithmetic number, because the mean of its divisors is an integer number (2461779).

Almost surely, 2^9664709 is an apocalyptic number.

It is an amenable number.

9664709 is a deficient number, since it is larger than the sum of its proper divisors (182407).

9664709 is a wasteful number, since it uses less digits than its factorization.

9664709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182406.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 9664709 is about 3108.8115092427. The cubic root of 9664709 is about 213.0081697293.

The spelling of 9664709 in words is "nine million, six hundred sixty-four thousand, seven hundred nine".