85187617 has 4 divisors (see below), whose sum is σ = 85212036. Its totient is φ = 85163200.

The previous prime is 85187611. The next prime is 85187633. The reversal of 85187617 is 71678158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71678158 = 2 ⋅35839079.

It can be written as a sum of positive squares in 2 ways, for example, as 28772496 + 56415121 = 5364^2 + 7511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85187617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85187611) 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, 5884 + ... + 14317.

It is an arithmetic number, because the mean of its divisors is an integer number (21303009).

Almost surely, 2^85187617 is an apocalyptic number.

It is an amenable number.

85187617 is a deficient number, since it is larger than the sum of its proper divisors (24419).

85187617 is a wasteful number, since it uses less digits than its factorization.

85187617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24418.

The product of its digits is 94080, while the sum is 43.

The square root of 85187617 is about 9229.7138092142. The cubic root of 85187617 is about 440.0062275289.

The spelling of 85187617 in words is "eighty-five million, one hundred eighty-seven thousand, six hundred seventeen".