985399 has 2 divisors, whose sum is σ = 985400. Its totient is φ = 985398.

The previous prime is 985379. The next prime is 985403. The reversal of 985399 is 993589.

It is a strong prime.

It is an emirp because it is prime and its reverse (993589) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 985399 - 2¹⁷ = 854327 is a prime.

It is a super-2 number, since 2×985399² = 1942022378402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985339) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492699 + 492700.

It is an arithmetic number, because the mean of its divisors is an integer number (492700).

2⁹⁸⁵³⁹⁹ is an apocalyptic number.

985399 is a deficient number, since it is larger than the sum of its proper divisors (1).

985399 is an equidigital number, since it uses as much as digits as its factorization.

985399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 43.

The square root of 985399 is about 992.6726550077. The cubic root of 985399 is about 99.5109118274.

The spelling of 985399 in words is "nine hundred eighty-five thousand, three hundred ninety-nine".