86855771 has 12 divisors (see below), whose sum is σ = 92689440. Its totient is φ = 81371520.

The previous prime is 86855759. The next prime is 86855773. The reversal of 86855771 is 17755868.

It is a happy number.

It is not a de Polignac number, because 86855771 - 2¹⁸ = 86593627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86855773) 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 11 ways as a sum of consecutive naturals, for example, 77765 + ... + 78873.

It is an arithmetic number, because the mean of its divisors is an integer number (7724120).

Almost surely, 2^86855771 is an apocalyptic number.

86855771 is a deficient number, since it is larger than the sum of its proper divisors (5833669).

86855771 is a wasteful number, since it uses less digits than its factorization.

86855771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414 (or 1397 counting only the distinct ones).

The product of its digits is 470400, while the sum is 47.

The square root of 86855771 is about 9319.6443601674. The cubic root of 86855771 is about 442.8597663637.

The spelling of 86855771 in words is "eighty-six million, eight hundred fifty-five thousand, seven hundred seventy-one".