85875217 has 2 divisors, whose sum is σ = 85875218. Its totient is φ = 85875216.

The previous prime is 85875199. The next prime is 85875221. The reversal of 85875217 is 71257858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43573201 + 42302016 = 6601^2 + 6504^2 .

It is a cyclic number.

It is not a de Polignac number, because 85875217 - 2¹¹ = 85873169 is a prime.

It is not a weakly prime, because it can be changed into another prime (85875227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42937608 + 42937609.

It is an arithmetic number, because the mean of its divisors is an integer number (42937609).

Almost surely, 2^85875217 is an apocalyptic number.

It is an amenable number.

85875217 is a deficient number, since it is larger than the sum of its proper divisors (1).

85875217 is an equidigital number, since it uses as much as digits as its factorization.

85875217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 156800, while the sum is 43.

The square root of 85875217 is about 9266.8882047859. Note that the first 3 decimals coincide. The cubic root of 85875217 is about 441.1869073334.

The spelling of 85875217 in words is "eighty-five million, eight hundred seventy-five thousand, two hundred seventeen".