85791559 has 16 divisors (see below), whose sum is σ = 100120576. Its totient is φ = 71992800.

The previous prime is 85791533. The next prime is 85791569. The reversal of 85791559 is 95519758.

It is a cyclic number.

It is not a de Polignac number, because 85791559 - 2¹³ = 85783367 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 (85791509) 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 15 ways as a sum of consecutive naturals, for example, 141034 + ... + 141640.

It is an arithmetic number, because the mean of its divisors is an integer number (6257536).

Almost surely, 2^85791559 is an apocalyptic number.

85791559 is a deficient number, since it is larger than the sum of its proper divisors (14329017).

85791559 is a wasteful number, since it uses less digits than its factorization.

85791559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006.

The product of its digits is 567000, while the sum is 49.

The square root of 85791559 is about 9262.3732919808. The cubic root of 85791559 is about 441.0435954934.

It can be divided in two parts, 857 and 91559, that added together give a square (92416 = 304²).

The spelling of 85791559 in words is "eighty-five million, seven hundred ninety-one thousand, five hundred fifty-nine".