9664549 has 4 divisors (see below), whose sum is σ = 9808864. Its totient is φ = 9520236.

The previous prime is 9664537. The next prime is 9664553. The reversal of 9664549 is 9454669.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-9664549 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9664519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72057 + ... + 72190.

It is an arithmetic number, because the mean of its divisors is an integer number (2452216).

Almost surely, 2^9664549 is an apocalyptic number.

It is an amenable number.

9664549 is a deficient number, since it is larger than the sum of its proper divisors (144315).

9664549 is a wasteful number, since it uses less digits than its factorization.

9664549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144314.

The product of its digits is 233280, while the sum is 43.

The square root of 9664549 is about 3108.7857758295. The cubic root of 9664549 is about 213.0069942673.

The spelling of 9664549 in words is "nine million, six hundred sixty-four thousand, five hundred forty-nine".