85171717 has 8 divisors (see below), whose sum is σ = 91324800. Its totient is φ = 79145664.

The previous prime is 85171693. The next prime is 85171721. The reversal of 85171717 is 71717158.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85171717 - 2⁷ = 85171589 is a prime.

It is a Duffinian number.

85171717 is a modest number, since divided by 171717 gives 85 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85171417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30367 + ... + 33052.

It is an arithmetic number, because the mean of its divisors is an integer number (11415600).

Almost surely, 2^85171717 is an apocalyptic number.

It is an amenable number.

85171717 is a deficient number, since it is larger than the sum of its proper divisors (6153083).

85171717 is a wasteful number, since it uses less digits than its factorization.

85171717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63515.

The product of its digits is 13720, while the sum is 37.

The square root of 85171717 is about 9228.8524205342. The cubic root of 85171717 is about 439.9788505675.

The spelling of 85171717 in words is "eighty-five million, one hundred seventy-one thousand, seven hundred seventeen".