85190173 has 4 divisors (see below), whose sum is σ = 85214428. Its totient is φ = 85165920.

The previous prime is 85190143. The next prime is 85190219. The reversal of 85190173 is 37109158.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37109158 = 2 ⋅18554579.

It can be written as a sum of positive squares in 2 ways, for example, as 69839449 + 15350724 = 8357^2 + 3918^2 .

It is a cyclic number.

It is not a de Polignac number, because 85190173 - 2¹³ = 85181981 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 (85190113) 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, 5736 + ... + 14257.

It is an arithmetic number, because the mean of its divisors is an integer number (21303607).

Almost surely, 2^85190173 is an apocalyptic number.

It is an amenable number.

85190173 is a deficient number, since it is larger than the sum of its proper divisors (24255).

85190173 is a wasteful number, since it uses less digits than its factorization.

85190173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24254.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 85190173 is about 9229.8522740074. The cubic root of 85190173 is about 440.0106281868.

The spelling of 85190173 in words is "eighty-five million, one hundred ninety thousand, one hundred seventy-three".