85456171 has 2 divisors, whose sum is σ = 85456172. Its totient is φ = 85456170.

The previous prime is 85456139. The next prime is 85456183. The reversal of 85456171 is 17165458.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85456171 - 2⁵ = 85456139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85456171.

It is not a weakly prime, because it can be changed into another prime (85456571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42728085 + 42728086.

It is an arithmetic number, because the mean of its divisors is an integer number (42728086).

Almost surely, 2^85456171 is an apocalyptic number.

85456171 is a deficient number, since it is larger than the sum of its proper divisors (1).

85456171 is an equidigital number, since it uses as much as digits as its factorization.

85456171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 37.

The square root of 85456171 is about 9244.2506997593. The cubic root of 85456171 is about 440.4681157760.

The spelling of 85456171 in words is "eighty-five million, four hundred fifty-six thousand, one hundred seventy-one".