85791158 has 4 divisors (see below), whose sum is σ = 128686740. Its totient is φ = 42895578.

The previous prime is 85791157. The next prime is 85791179. The reversal of 85791158 is 85119758.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85791151) 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 as a sum of consecutive naturals, namely, 21447788 + ... + 21447791.

It is an arithmetic number, because the mean of its divisors is an integer number (32171685).

Almost surely, 2^85791158 is an apocalyptic number.

85791158 is a deficient number, since it is larger than the sum of its proper divisors (42895582).

85791158 is a wasteful number, since it uses less digits than its factorization.

85791158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42895581.

The product of its digits is 100800, while the sum is 44.

The square root of 85791158 is about 9262.3516452357. The cubic root of 85791158 is about 441.0429083289.

The spelling of 85791158 in words is "eighty-five million, seven hundred ninety-one thousand, one hundred fifty-eight".