85939316173 has 2 divisors, whose sum is σ = 85939316174. Its totient is φ = 85939316172.

The previous prime is 85939316167. The next prime is 85939316209. The reversal of 85939316173 is 37161393958.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85219037929 + 720278244 = 291923^2 + 26838^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85939316173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85939316273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42969658086 + 42969658087.

It is an arithmetic number, because the mean of its divisors is an integer number (42969658087).

Almost surely, 2^85939316173 is an apocalyptic number.

It is an amenable number.

85939316173 is a deficient number, since it is larger than the sum of its proper divisors (1).

85939316173 is an equidigital number, since it uses as much as digits as its factorization.

85939316173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 55.

The spelling of 85939316173 in words is "eighty-five billion, nine hundred thirty-nine million, three hundred sixteen thousand, one hundred seventy-three".