985803993 has 16 divisors (see below), whose sum is σ = 1466520000. Its totient is φ = 654471360.

The previous prime is 985803971. The next prime is 985804033. The reversal of 985803993 is 399308589.

985803993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 985803993 - 2¹⁰ = 985802969 is a prime.

It is a super-2 number, since 2×985803993² = 1943619025229488098, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (985803593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69243 + ... + 82256.

It is an arithmetic number, because the mean of its divisors is an integer number (91657500).

Almost surely, 2^985803993 is an apocalyptic number.

It is an amenable number.

985803993 is a deficient number, since it is larger than the sum of its proper divisors (480716007).

985803993 is a wasteful number, since it uses less digits than its factorization.

985803993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151749 (or 151743 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The square root of 985803993 is about 31397.5157138268. The cubic root of 985803993 is about 995.2454275346.

The spelling of 985803993 in words is "nine hundred eighty-five million, eight hundred three thousand, nine hundred ninety-three".