855799389 has 12 divisors (see below), whose sum is σ = 1243740576. Its totient is φ = 567031752.

The previous prime is 855799379. The next prime is 855799391. The reversal of 855799389 is 983997558.

855799389 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 855799389 - 2¹³ = 855791197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855799369) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 290217 + ... + 293150.

It is an arithmetic number, because the mean of its divisors is an integer number (103645048).

Almost surely, 2^855799389 is an apocalyptic number.

It is an amenable number.

855799389 is a deficient number, since it is larger than the sum of its proper divisors (387941187).

855799389 is a wasteful number, since it uses less digits than its factorization.

855799389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583536 (or 583533 counting only the distinct ones).

The product of its digits is 24494400, while the sum is 63.

The square root of 855799389 is about 29254.0491043548. The cubic root of 855799389 is about 949.4177000328.

The spelling of 855799389 in words is "eight hundred fifty-five million, seven hundred ninety-nine thousand, three hundred eighty-nine".