85647887 has 16 divisors (see below), whose sum is σ = 98017920. Its totient is φ = 74138112.

The previous prime is 85647869. The next prime is 85647901. The reversal of 85647887 is 78874658.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 85647887 - 2¹⁸ = 85385743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85647827) 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 15 ways as a sum of consecutive naturals, for example, 81914 + ... + 82952.

It is an arithmetic number, because the mean of its divisors is an integer number (6126120).

Almost surely, 2^85647887 is an apocalyptic number.

85647887 is a deficient number, since it is larger than the sum of its proper divisors (12370033).

85647887 is a wasteful number, since it uses less digits than its factorization.

85647887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442.

The product of its digits is 3010560, while the sum is 53.

The square root of 85647887 is about 9254.6143625761. The cubic root of 85647887 is about 440.7972580481.

The spelling of 85647887 in words is "eighty-five million, six hundred forty-seven thousand, eight hundred eighty-seven".