9897566 has 16 divisors (see below), whose sum is σ = 17007840. Its totient is φ = 4231680.

The previous prime is 9897541. The next prime is 9897571. The reversal of 9897566 is 6657989.

9897566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10190 + ... + 11118.

It is an arithmetic number, because the mean of its divisors is an integer number (1062990).

Almost surely, 2^9897566 is an apocalyptic number.

9897566 is a deficient number, since it is larger than the sum of its proper divisors (7110274).

9897566 is a wasteful number, since it uses less digits than its factorization.

9897566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699.

The product of its digits is 816480, while the sum is 50.

The square root of 9897566 is about 3146.0397327434. The cubic root of 9897566 is about 214.7053183020.

The spelling of 9897566 in words is "nine million, eight hundred ninety-seven thousand, five hundred sixty-six".