85171849 has 24 divisors (see below), whose sum is σ = 104537088. Its totient is φ = 69088320.

The previous prime is 85171847. The next prime is 85171871. The reversal of 85171849 is 94817158.

It is a happy number.

It is not a de Polignac number, because 85171849 - 2¹ = 85171847 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85171841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70797 + ... + 71989.

It is an arithmetic number, because the mean of its divisors is an integer number (4355712).

Almost surely, 2^85171849 is an apocalyptic number.

It is an amenable number.

85171849 is a deficient number, since it is larger than the sum of its proper divisors (19365239).

85171849 is a wasteful number, since it uses less digits than its factorization.

85171849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285 (or 1278 counting only the distinct ones).

The product of its digits is 80640, while the sum is 43.

The square root of 85171849 is about 9228.8595720165. The cubic root of 85171849 is about 439.9790778619.

The spelling of 85171849 in words is "eighty-five million, one hundred seventy-one thousand, eight hundred forty-nine".