9897558 has 24 divisors (see below), whose sum is σ = 21759864. Its totient is φ = 2999040.

The previous prime is 9897541. The next prime is 9897571. The reversal of 9897558 is 8557989.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9897558.

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 11 ways as a sum of consecutive naturals, for example, 6091 + ... + 7542.

It is an arithmetic number, because the mean of its divisors is an integer number (906661).

Almost surely, 2^9897558 is an apocalyptic number.

9897558 is an abundant number, since it is smaller than the sum of its proper divisors (11862306).

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

9897558 is a wasteful number, since it uses less digits than its factorization.

9897558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13660 (or 13649 counting only the distinct ones).

The product of its digits is 907200, while the sum is 51.

The square root of 9897558 is about 3146.0384613034. The cubic root of 9897558 is about 214.7052604547.

The spelling of 9897558 in words is "nine million, eight hundred ninety-seven thousand, five hundred fifty-eight".