85170751 has 4 divisors (see below), whose sum is σ = 85208904. Its totient is φ = 85132600.

The previous prime is 85170727. The next prime is 85170763. The reversal of 85170751 is 15707158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15707158 = 2 ⋅7853579.

It is a cyclic number.

It is not a de Polignac number, because 85170751 - 2¹¹ = 85168703 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 (85170451) 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, 15505 + ... + 20266.

It is an arithmetic number, because the mean of its divisors is an integer number (21302226).

Almost surely, 2^85170751 is an apocalyptic number.

85170751 is a deficient number, since it is larger than the sum of its proper divisors (38153).

85170751 is a wasteful number, since it uses less digits than its factorization.

85170751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38152.

The product of its (nonzero) digits is 9800, while the sum is 34.

The square root of 85170751 is about 9228.8000845180. The cubic root of 85170751 is about 439.9771871781.

The spelling of 85170751 in words is "eighty-five million, one hundred seventy thousand, seven hundred fifty-one".