85136617 has 4 divisors (see below), whose sum is σ = 85453380. Its totient is φ = 84819856.

The previous prime is 85136591. The next prime is 85136621. The reversal of 85136617 is 71663158.

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 2399401 + 82737216 = 1549^2 + 9096^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85136617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85136627) 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, 157978 + ... + 158515.

It is an arithmetic number, because the mean of its divisors is an integer number (21363345).

Almost surely, 2^85136617 is an apocalyptic number.

It is an amenable number.

85136617 is a deficient number, since it is larger than the sum of its proper divisors (316763).

85136617 is a wasteful number, since it uses less digits than its factorization.

85136617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316762.

The product of its digits is 30240, while the sum is 37.

The square root of 85136617 is about 9226.9505796877. The cubic root of 85136617 is about 439.9184025685.

The spelling of 85136617 in words is "eighty-five million, one hundred thirty-six thousand, six hundred seventeen".