9897885 has 12 divisors (see below), whose sum is σ = 17156412. Its totient is φ = 5278848.

The previous prime is 9897863. The next prime is 9897887. The reversal of 9897885 is 5887989.

It can be written as a sum of positive squares in 2 ways, for example, as 1758276 + 8139609 = 1326^2 + 2853^2 .

It is not a de Polignac number, because 9897885 - 2¹² = 9893789 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9897887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109932 + ... + 110021.

It is an arithmetic number, because the mean of its divisors is an integer number (1429701).

Almost surely, 2^9897885 is an apocalyptic number.

It is an amenable number.

9897885 is a deficient number, since it is larger than the sum of its proper divisors (7258527).

9897885 is a wasteful number, since it uses less digits than its factorization.

9897885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219964 (or 219961 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The square root of 9897885 is about 3146.0904309953. The cubic root of 9897885 is about 214.7076249385.

The spelling of 9897885 in words is "nine million, eight hundred ninety-seven thousand, eight hundred eighty-five".