985581613 has 6 divisors (see below), whose sum is σ = 1046967626. Its totient is φ = 927605952.

The previous prime is 985581589. The next prime is 985581631. The reversal of 985581613 is 316185589.

It can be written as a sum of positive squares in 3 ways, for example, as 744307524 + 241274089 = 27282^2 + 15533^2 .

It is not a de Polignac number, because 985581613 - 2¹⁷ = 985450541 is a prime.

It is a super-2 number, since 2×985581613² = 1942742231767363538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985581673) 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 5 ways as a sum of consecutive naturals, for example, 1704870 + ... + 1705447.

Almost surely, 2^985581613 is an apocalyptic number.

It is an amenable number.

985581613 is a deficient number, since it is larger than the sum of its proper divisors (61386013).

985581613 is a wasteful number, since it uses less digits than its factorization.

985581613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410351 (or 3410334 counting only the distinct ones).

The product of its digits is 259200, while the sum is 46.

The square root of 985581613 is about 31393.9741511010. The cubic root of 985581613 is about 995.1705852995.

The spelling of 985581613 in words is "nine hundred eighty-five million, five hundred eighty-one thousand, six hundred thirteen".