9897564 has 24 divisors (see below), whose sum is σ = 23658768. Its totient is φ = 3218560.

The previous prime is 9897541. The next prime is 9897571. The reversal of 9897564 is 4657989.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9567 + ... + 10550.

It is an arithmetic number, because the mean of its divisors is an integer number (985782).

Almost surely, 2^9897564 is an apocalyptic number.

It is an amenable number.

9897564 is an abundant number, since it is smaller than the sum of its proper divisors (13761204).

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

9897564 is a wasteful number, since it uses less digits than its factorization.

9897564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20165 (or 20163 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The square root of 9897564 is about 3146.0394148834. The cubic root of 9897564 is about 214.7053038402.

The spelling of 9897564 in words is "nine million, eight hundred ninety-seven thousand, five hundred sixty-four".