985917 has 4 divisors (see below), whose sum is σ = 1314560. Its totient is φ = 657276.

The previous prime is 985903. The next prime is 985921. The reversal of 985917 is 719589.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 985917 - 2¹⁴ = 969533 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 985917.

It is not an unprimeable number, because it can be changed into a prime (985937) 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, 164317 + ... + 164322.

It is an arithmetic number, because the mean of its divisors is an integer number (328640).

2⁹⁸⁵⁹¹⁷ is an apocalyptic number.

It is an amenable number.

985917 is a deficient number, since it is larger than the sum of its proper divisors (328643).

985917 is a wasteful number, since it uses less digits than its factorization.

985917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328642.

The product of its digits is 22680, while the sum is 39.

The square root of 985917 is about 992.9335325187. The cubic root of 985917 is about 99.5283455852.

The spelling of 985917 in words is "nine hundred eighty-five thousand, nine hundred seventeen".