9897555 has 32 divisors (see below), whose sum is σ = 16695360. Its totient is φ = 4999680.

The previous prime is 9897541. The next prime is 9897571. The reversal of 9897555 is 5557989.

9897555 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9897555 - 2⁴ = 9897539 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 26349 + ... + 26721.

It is an arithmetic number, because the mean of its divisors is an integer number (521730).

Almost surely, 2^9897555 is an apocalyptic number.

9897555 is a deficient number, since it is larger than the sum of its proper divisors (6797805).

9897555 is a wasteful number, since it uses less digits than its factorization.

9897555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471.

The product of its digits is 567000, while the sum is 48.

The square root of 9897555 is about 3146.0379845132. The cubic root of 9897555 is about 214.7052387619.

The spelling of 9897555 in words is "nine million, eight hundred ninety-seven thousand, five hundred fifty-five".