85109717 has 24 divisors (see below), whose sum is σ = 108591840. Its totient is φ = 65960160.

The previous prime is 85109681. The next prime is 85109723. The reversal of 85109717 is 71790158.

It is not a de Polignac number, because 85109717 - 2⁶ = 85109653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85109737) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144698 + ... + 145284.

It is an arithmetic number, because the mean of its divisors is an integer number (4524660).

Almost surely, 2^85109717 is an apocalyptic number.

It is an amenable number.

85109717 is a deficient number, since it is larger than the sum of its proper divisors (23482123).

85109717 is a wasteful number, since it uses less digits than its factorization.

85109717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881 (or 874 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 38.

The square root of 85109717 is about 9225.4927781664. The cubic root of 85109717 is about 439.8720650778.

The spelling of 85109717 in words is "eighty-five million, one hundred nine thousand, seven hundred seventeen".