985330809 has 6 divisors (see below), whose sum is σ = 1423255626. Its totient is φ = 656887200.

The previous prime is 985330799. The next prime is 985330811. The reversal of 985330809 is 908033589.

It can be written as a sum of positive squares in only one way, i.e., 593409600 + 391921209 = 24360^2 + 19797^2 .

It is not a de Polignac number, because 985330809 - 2⁵ = 985330777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (985330109) 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 5 ways as a sum of consecutive naturals, for example, 54740592 + ... + 54740609.

It is an arithmetic number, because the mean of its divisors is an integer number (237209271).

Almost surely, 2^985330809 is an apocalyptic number.

It is an amenable number.

985330809 is a deficient number, since it is larger than the sum of its proper divisors (437924817).

985330809 is a wasteful number, since it uses less digits than its factorization.

985330809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109481207 (or 109481204 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 985330809 is about 31389.9794361194. The cubic root of 985330809 is about 995.0861634263.

The spelling of 985330809 in words is "nine hundred eighty-five million, three hundred thirty thousand, eight hundred nine".