985813 has 8 divisors (see below), whose sum is σ = 1055808. Its totient is φ = 917184.

The previous prime is 985807. The next prime is 985819. The reversal of 985813 is 318589.

It is an interprime number because it is at equal distance from previous prime (985807) and next prime (985819).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 985813 - 2⁵ = 985781 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 (985819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1470 + ... + 2032.

It is an arithmetic number, because the mean of its divisors is an integer number (131976).

2⁹⁸⁵⁸¹³ is an apocalyptic number.

It is an amenable number.

985813 is a deficient number, since it is larger than the sum of its proper divisors (69995).

985813 is a wasteful number, since it uses less digits than its factorization.

985813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683.

The product of its digits is 8640, while the sum is 34.

The square root of 985813 is about 992.8811610661. The cubic root of 985813 is about 99.5248458613.

The spelling of 985813 in words is "nine hundred eighty-five thousand, eight hundred thirteen".