9855897 has 4 divisors (see below), whose sum is σ = 13141200. Its totient is φ = 6570596.

The previous prime is 9855887. The next prime is 9855913. The reversal of 9855897 is 7985589.

9855897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7985589 = 3 ⋅2661863.

It is a cyclic number.

It is not a de Polignac number, because 9855897 - 2¹⁵ = 9823129 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (9855817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1642647 + ... + 1642652.

It is an arithmetic number, because the mean of its divisors is an integer number (3285300).

Almost surely, 2^9855897 is an apocalyptic number.

It is an amenable number.

9855897 is a deficient number, since it is larger than the sum of its proper divisors (3285303).

9855897 is a wasteful number, since it uses less digits than its factorization.

9855897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3285302.

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

The square root of 9855897 is about 3139.4102949439. The cubic root of 9855897 is about 214.4035895594.

The spelling of 9855897 in words is "nine million, eight hundred fifty-five thousand, eight hundred ninety-seven".