85704173 has 4 divisors (see below), whose sum is σ = 88020540. Its totient is φ = 83387808.

The previous prime is 85704169. The next prime is 85704197. The reversal of 85704173 is 37140758.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37140758 = 2 ⋅18570379.

It can be written as a sum of positive squares in 2 ways, for example, as 81775849 + 3928324 = 9043^2 + 1982^2 .

It is a cyclic number.

It is not a de Polignac number, because 85704173 - 2² = 85704169 is a prime.

It is a super-2 number, since 2×85704173² = 14690410539227858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85704163) 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, 1158128 + ... + 1158201.

It is an arithmetic number, because the mean of its divisors is an integer number (22005135).

Almost surely, 2^85704173 is an apocalyptic number.

It is an amenable number.

85704173 is a deficient number, since it is larger than the sum of its proper divisors (2316367).

85704173 is a wasteful number, since it uses less digits than its factorization.

85704173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316366.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 85704173 is about 9257.6548326236. The cubic root of 85704173 is about 440.8937978161.

The spelling of 85704173 in words is "eighty-five million, seven hundred four thousand, one hundred seventy-three".