85644271 has 2 divisors, whose sum is σ = 85644272. Its totient is φ = 85644270.

The previous prime is 85644269. The next prime is 85644287. The reversal of 85644271 is 17244658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85644271 - 2¹ = 85644269 is a prime.

Together with 85644269, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 85644271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85644211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42822135 + 42822136.

It is an arithmetic number, because the mean of its divisors is an integer number (42822136).

Almost surely, 2^85644271 is an apocalyptic number.

85644271 is a deficient number, since it is larger than the sum of its proper divisors (1).

85644271 is an equidigital number, since it uses as much as digits as its factorization.

85644271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 37.

The square root of 85644271 is about 9254.4189985109. The cubic root of 85644271 is about 440.7910545663.

The spelling of 85644271 in words is "eighty-five million, six hundred forty-four thousand, two hundred seventy-one".