9985805017 has 4 divisors (see below), whose sum is σ = 9992211840. Its totient is φ = 9979398196.

The previous prime is 9985804999. The next prime is 9985805021. The reversal of 9985805017 is 7105085899.

9985805017 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.

It is a cyclic number.

It is not a de Polignac number, because 9985805017 - 2¹¹ = 9985802969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9985805917) 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, 3201073 + ... + 3204190.

It is an arithmetic number, because the mean of its divisors is an integer number (2498052960).

Almost surely, 2^9985805017 is an apocalyptic number.

It is an amenable number.

9985805017 is a deficient number, since it is larger than the sum of its proper divisors (6406823).

9985805017 is a wasteful number, since it uses less digits than its factorization.

9985805017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6406822.

The product of its (nonzero) digits is 907200, while the sum is 52.

The square root of 9985805017 is about 99928.9998799147. Note that the first 3 decimals coincide. The cubic root of 9985805017 is about 2153.4148018430.

The spelling of 9985805017 in words is "nine billion, nine hundred eighty-five million, eight hundred five thousand, seventeen".