985772993 has 4 divisors (see below), whose sum is σ = 1001933268. Its totient is φ = 969612720.

The previous prime is 985772987. The next prime is 985773007. The reversal of 985772993 is 399277589.

985772993 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 64529089 + 921243904 = 8033^2 + 30352^2 .

It is a cyclic number.

It is not a de Polignac number, because 985772993 - 2¹⁸ = 985510849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (985472993) 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, 8080046 + ... + 8080167.

It is an arithmetic number, because the mean of its divisors is an integer number (250483317).

Almost surely, 2^985772993 is an apocalyptic number.

It is an amenable number.

985772993 is a deficient number, since it is larger than the sum of its proper divisors (16160275).

985772993 is a wasteful number, since it uses less digits than its factorization.

985772993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16160274.

The product of its digits is 8573040, while the sum is 59.

The square root of 985772993 is about 31397.0220403146. The cubic root of 985772993 is about 995.2349951255.

The spelling of 985772993 in words is "nine hundred eighty-five million, seven hundred seventy-two thousand, nine hundred ninety-three".