85716791 has 4 divisors (see below), whose sum is σ = 89443632. Its totient is φ = 81989952.

The previous prime is 85716769. The next prime is 85716797. The reversal of 85716791 is 19761758.

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

It is a cyclic number.

It is not a de Polignac number, because 85716791 - 2⁶ = 85716727 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 (85716797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1863386 + ... + 1863431.

It is an arithmetic number, because the mean of its divisors is an integer number (22360908).

Almost surely, 2^85716791 is an apocalyptic number.

85716791 is a deficient number, since it is larger than the sum of its proper divisors (3726841).

85716791 is a wasteful number, since it uses less digits than its factorization.

85716791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3726840.

The product of its digits is 105840, while the sum is 44.

The square root of 85716791 is about 9258.3362976293. The cubic root of 85716791 is about 440.9154339658.

The spelling of 85716791 in words is "eighty-five million, seven hundred sixteen thousand, seven hundred ninety-one".