9985805039 has 16 divisors (see below), whose sum is σ = 11673593856. Its totient is φ = 8363904000.

The previous prime is 9985805023. The next prime is 9985805069. The reversal of 9985805039 is 9305085899.

It is a cyclic number.

It is not a de Polignac number, because 9985805039 - 2⁴ = 9985805023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9985805069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187214 + ... + 234564.

It is an arithmetic number, because the mean of its divisors is an integer number (729599616).

Almost surely, 2^9985805039 is an apocalyptic number.

9985805039 is a deficient number, since it is larger than the sum of its proper divisors (1687788817).

9985805039 is a wasteful number, since it uses less digits than its factorization.

9985805039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48046.

The product of its (nonzero) digits is 3499200, while the sum is 56.

The square root of 9985805039 is about 99928.9999899929. Note that the first 4 decimals coincide. The cubic root of 9985805039 is about 2153.4148034245.

The spelling of 9985805039 in words is "nine billion, nine hundred eighty-five million, eight hundred five thousand, thirty-nine".