9664239 has 16 divisors (see below), whose sum is σ = 13934592. Its totient is φ = 5922528.

The previous prime is 9664231. The next prime is 9664247. The reversal of 9664239 is 9324669.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9664231) and next prime (9664247).

It is not a de Polignac number, because 9664239 - 2³ = 9664231 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 9664197 and 9664206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9664231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14614 + ... + 15260.

It is an arithmetic number, because the mean of its divisors is an integer number (870912).

Almost surely, 2^9664239 is an apocalyptic number.

9664239 is a deficient number, since it is larger than the sum of its proper divisors (4270353).

9664239 is a wasteful number, since it uses less digits than its factorization.

9664239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046.

The product of its digits is 69984, while the sum is 39.

The square root of 9664239 is about 3108.7359167353. The cubic root of 9664239 is about 213.0047167727.

The spelling of 9664239 in words is "nine million, six hundred sixty-four thousand, two hundred thirty-nine".