85647171 has 8 divisors (see below), whose sum is σ = 114333520. Its totient is φ = 57029472.

The previous prime is 85647169. The next prime is 85647181. The reversal of 85647171 is 17174658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85647171 - 2¹ = 85647169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85647131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14176 + ... + 19293.

It is an arithmetic number, because the mean of its divisors is an integer number (14291690).

Almost surely, 2^85647171 is an apocalyptic number.

85647171 is a deficient number, since it is larger than the sum of its proper divisors (28686349).

85647171 is a wasteful number, since it uses less digits than its factorization.

85647171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34325.

The product of its digits is 47040, while the sum is 39.

The square root of 85647171 is about 9254.5756790898. The cubic root of 85647171 is about 440.7960297177.

The spelling of 85647171 in words is "eighty-five million, six hundred forty-seven thousand, one hundred seventy-one".