85372173 has 6 divisors (see below), whose sum is σ = 123315374. Its totient is φ = 56914776.

The previous prime is 85372151. The next prime is 85372193. The reversal of 85372173 is 37127358.

It can be written as a sum of positive squares in only one way, i.e., 84879369 + 492804 = 9213^2 + 702^2 .

It is not a de Polignac number, because 85372173 - 2⁸ = 85371917 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 (85372193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4742890 + ... + 4742907.

Almost surely, 2^85372173 is an apocalyptic number.

It is an amenable number.

85372173 is a deficient number, since it is larger than the sum of its proper divisors (37943201).

85372173 is a wasteful number, since it uses less digits than its factorization.

85372173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9485803 (or 9485800 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 85372173 is about 9239.7063265019. The cubic root of 85372173 is about 440.3237510513.

The spelling of 85372173 in words is "eighty-five million, three hundred seventy-two thousand, one hundred seventy-three".