9664541 has 4 divisors (see below), whose sum is σ = 9673152. Its totient is φ = 9655932.

The previous prime is 9664537. The next prime is 9664553. The reversal of 9664541 is 1454669.

9664541 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 a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9664541 - 2² = 9664537 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 (9664741) 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, 2315 + ... + 4968.

It is an arithmetic number, because the mean of its divisors is an integer number (2418288).

Almost surely, 2^9664541 is an apocalyptic number.

It is an amenable number.

9664541 is a deficient number, since it is larger than the sum of its proper divisors (8611).

9664541 is a wasteful number, since it uses less digits than its factorization.

9664541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8610.

The product of its digits is 25920, while the sum is 35.

The square root of 9664541 is about 3108.7844891533. The cubic root of 9664541 is about 213.0069354939.

The spelling of 9664541 in words is "nine million, six hundred sixty-four thousand, five hundred forty-one".