9840868897 has 4 divisors (see below), whose sum is σ = 10419743556. Its totient is φ = 9261994240.

The previous prime is 9840868889. The next prime is 9840868943. The reversal of 9840868897 is 7988680489.

9840868897 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.

It can be written as a sum of positive squares in 2 ways, for example, as 5709464721 + 4131404176 = 75561^2 + 64276^2 .

It is a cyclic number.

It is not a de Polignac number, because 9840868897 - 2³ = 9840868889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9840568897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289437304 + ... + 289437337.

It is an arithmetic number, because the mean of its divisors is an integer number (2604935889).

Almost surely, 2^9840868897 is an apocalyptic number.

It is an amenable number.

9840868897 is a deficient number, since it is larger than the sum of its proper divisors (578874659).

9840868897 is a wasteful number, since it uses less digits than its factorization.

9840868897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578874658.

The product of its (nonzero) digits is 55738368, while the sum is 67.

The square root of 9840868897 is about 99201.1537080089. The cubic root of 9840868897 is about 2142.9456115160.

The spelling of 9840868897 in words is "nine billion, eight hundred forty million, eight hundred sixty-eight thousand, eight hundred ninety-seven".