85317719 has 4 divisors (see below), whose sum is σ = 87301896. Its totient is φ = 83333544.

The previous prime is 85317707. The next prime is 85317721. The reversal of 85317719 is 91771358.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85317719 is a prime.

It is a super-2 number, since 2×85317719² = 14558226350725922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85317769) 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, 992024 + ... + 992109.

It is an arithmetic number, because the mean of its divisors is an integer number (21825474).

Almost surely, 2^85317719 is an apocalyptic number.

85317719 is a deficient number, since it is larger than the sum of its proper divisors (1984177).

85317719 is a wasteful number, since it uses less digits than its factorization.

85317719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984176.

The product of its digits is 52920, while the sum is 41.

The square root of 85317719 is about 9236.7591177858. The cubic root of 85317719 is about 440.2301120726.

The spelling of 85317719 in words is "eighty-five million, three hundred seventeen thousand, seven hundred nineteen".