85312817 has 8 divisors (see below), whose sum is σ = 92432736. Its totient is φ = 78426432.

The previous prime is 85312813. The next prime is 85312859. The reversal of 85312817 is 71821358.

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 85312817 - 2² = 85312813 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85312813) 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, 57623 + ... + 59084.

It is an arithmetic number, because the mean of its divisors is an integer number (11554092).

Almost surely, 2^85312817 is an apocalyptic number.

It is an amenable number.

85312817 is a deficient number, since it is larger than the sum of its proper divisors (7119919).

85312817 is a wasteful number, since it uses less digits than its factorization.

85312817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116767.

The product of its digits is 13440, while the sum is 35.

The square root of 85312817 is about 9236.4937611628. The cubic root of 85312817 is about 440.2216806495.

The spelling of 85312817 in words is "eighty-five million, three hundred twelve thousand, eight hundred seventeen".