9699664 has 20 divisors (see below), whose sum is σ = 20239156. Its totient is φ = 4476672.

The previous prime is 9699653. The next prime is 9699667. The reversal of 9699664 is 4669969.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1904400 + 7795264 = 1380^2 + 2792^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9699667) 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, 23109 + ... + 23524.

Almost surely, 2^9699664 is an apocalyptic number.

It is an amenable number.

9699664 is an abundant number, since it is smaller than the sum of its proper divisors (10539492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9699664 is a wasteful number, since it uses less digits than its factorization.

9699664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46654 (or 46648 counting only the distinct ones).

The product of its digits is 629856, while the sum is 49.

The square root of 9699664 is about 3114.4283584632. The cubic root of 9699664 is about 213.2646610564.

The spelling of 9699664 in words is "nine million, six hundred ninety-nine thousand, six hundred sixty-four".