999737985 has 16 divisors (see below), whose sum is σ = 1609163136. Its totient is φ = 529999488.

The previous prime is 999737957. The next prime is 999738001. The reversal of 999737985 is 589737999.

999737985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 999737985 - 2⁷ = 999737857 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197044 + ... + 202053.

It is an arithmetic number, because the mean of its divisors is an integer number (100572696).

Almost surely, 2^999737985 is an apocalyptic number.

It is an amenable number.

999737985 is a deficient number, since it is larger than the sum of its proper divisors (609425151).

999737985 is a wasteful number, since it uses less digits than its factorization.

999737985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399272.

The product of its digits is 38578680, while the sum is 66.

The square root of 999737985 is about 31618.6335093723. The cubic root of 999737985 is about 999.9126540376.

The spelling of 999737985 in words is "nine hundred ninety-nine million, seven hundred thirty-seven thousand, nine hundred eighty-five".