1099985799 has 32 divisors (see below), whose sum is σ = 1713208320. Its totient is φ = 620364800.

The previous prime is 1099985773. The next prime is 1099985819. The reversal of 1099985799 is 9975899901.

It is not a de Polignac number, because 1099985799 - 2⁹ = 1099985287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099985729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38914 + ... + 60944.

It is an arithmetic number, because the mean of its divisors is an integer number (53537760).

Almost surely, 2^1099985799 is an apocalyptic number.

1099985799 is a deficient number, since it is larger than the sum of its proper divisors (613222521).

1099985799 is a wasteful number, since it uses less digits than its factorization.

1099985799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22151.

The product of its (nonzero) digits is 16533720, while the sum is 66.

The square root of 1099985799 is about 33166.0338147328. The cubic root of 1099985799 is about 1032.2756731918.

The spelling of 1099985799 in words is "one billion, ninety-nine million, nine hundred eighty-five thousand, seven hundred ninety-nine".