985799 has 2 divisors, whose sum is σ = 985800. Its totient is φ = 985798.

The previous prime is 985783. The next prime is 985807. The reversal of 985799 is 997589.

It is a strong prime.

It is an emirp because it is prime and its reverse (997589) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 985799 - 2⁴ = 985783 is a prime.

It is a Chen prime.

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 985799.

It is not a weakly prime, because it can be changed into another prime (985709) 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 as a sum of consecutive naturals, namely, 492899 + 492900.

It is an arithmetic number, because the mean of its divisors is an integer number (492900).

2⁹⁸⁵⁷⁹⁹ is an apocalyptic number.

985799 is a deficient number, since it is larger than the sum of its proper divisors (1).

985799 is an equidigital number, since it uses as much as digits as its factorization.

985799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 47.

The square root of 985799 is about 992.8741108519. The cubic root of 985799 is about 99.5243747258.

The spelling of 985799 in words is "nine hundred eighty-five thousand, seven hundred ninety-nine".