85171841 has 2 divisors, whose sum is σ = 85171842. Its totient is φ = 85171840.

The previous prime is 85171789. The next prime is 85171847. The reversal of 85171841 is 14817158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75186241 + 9985600 = 8671^2 + 3160^2 .

It is a cyclic number.

It is not a de Polignac number, because 85171841 - 2¹⁴ = 85155457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85171847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42585920 + 42585921.

It is an arithmetic number, because the mean of its divisors is an integer number (42585921).

Almost surely, 2^85171841 is an apocalyptic number.

It is an amenable number.

85171841 is a deficient number, since it is larger than the sum of its proper divisors (1).

85171841 is an equidigital number, since it uses as much as digits as its factorization.

85171841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 35.

The square root of 85171841 is about 9228.8591385935. The cubic root of 85171841 is about 439.9790640865.

Adding to 85171841 its reverse (14817158), we get a palindrome (99988999).

The spelling of 85171841 in words is "eighty-five million, one hundred seventy-one thousand, eight hundred forty-one".