82085317 has 4 divisors (see below), whose sum is σ = 82280716. Its totient is φ = 81889920.

The previous prime is 82085309. The next prime is 82085329. The reversal of 82085317 is 71358028.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26224641 + 55860676 = 5121^2 + 7474^2 .

It is a cyclic number.

It is not a de Polignac number, because 82085317 - 2³ = 82085309 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 (82085357) 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, 97068 + ... + 97909.

It is an arithmetic number, because the mean of its divisors is an integer number (20570179).

Almost surely, 2^82085317 is an apocalyptic number.

It is an amenable number.

82085317 is a deficient number, since it is larger than the sum of its proper divisors (195399).

82085317 is a wasteful number, since it uses less digits than its factorization.

82085317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195398.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 82085317 is about 9060.0947566789. The cubic root of 82085317 is about 434.5987703861.

The spelling of 82085317 in words is "eighty-two million, eighty-five thousand, three hundred seventeen".