985319999 has 4 divisors (see below), whose sum is σ = 990824760. Its totient is φ = 979815240.

The previous prime is 985319989. The next prime is 985320013. The reversal of 985319999 is 999913589.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985319999 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 (985319989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2752112 + ... + 2752469.

It is an arithmetic number, because the mean of its divisors is an integer number (247706190).

Almost surely, 2^985319999 is an apocalyptic number.

985319999 is a deficient number, since it is larger than the sum of its proper divisors (5504761).

985319999 is a wasteful number, since it uses less digits than its factorization.

985319999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5504760.

The product of its digits is 7085880, while the sum is 62.

The square root of 985319999 is about 31389.8072469393. The cubic root of 985319999 is about 995.0825244045.

The spelling of 985319999 in words is "nine hundred eighty-five million, three hundred nineteen thousand, nine hundred ninety-nine".