999998785 has 16 divisors (see below), whose sum is σ = 1282017600. Its totient is φ = 746577216.

The previous prime is 999998777. The next prime is 999998789. The reversal of 999998785 is 587899999.

999998785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 999998785 - 2³ = 999998777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999998789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72190 + ... + 84919.

It is an arithmetic number, because the mean of its divisors is an integer number (80126100).

Almost surely, 2^999998785 is an apocalyptic number.

999998785 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

999998785 is a deficient number, since it is larger than the sum of its proper divisors (282018815).

999998785 is a wasteful number, since it uses less digits than its factorization.

999998785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157200.

The product of its digits is 132269760, while the sum is 73.

The square root of 999998785 is about 31622.7573908412. The cubic root of 999998785 is about 999.9995949998. Note that the first 3 decimals are identical.

The spelling of 999998785 in words is "nine hundred ninety-nine million, nine hundred ninety-eight thousand, seven hundred eighty-five".