85870317 has 16 divisors (see below), whose sum is σ = 124577600. Its totient is φ = 52296192.

The previous prime is 85870297. The next prime is 85870319. The reversal of 85870317 is 71307858.

It is not a de Polignac number, because 85870317 - 2⁸ = 85870061 is a prime.

It is a super-2 number, since 2×85870317² = 14747422683360978, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85870319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7567 + ... + 15132.

It is an arithmetic number, because the mean of its divisors is an integer number (7786100).

Almost surely, 2^85870317 is an apocalyptic number.

It is an amenable number.

85870317 is a deficient number, since it is larger than the sum of its proper divisors (38707283).

85870317 is a wasteful number, since it uses less digits than its factorization.

85870317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22812.

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 85870317 is about 9266.6238188458. The cubic root of 85870317 is about 441.1785158671.

The spelling of 85870317 in words is "eighty-five million, eight hundred seventy thousand, three hundred seventeen".