86128871 has 4 divisors (see below), whose sum is σ = 88131912. Its totient is φ = 84125832.

The previous prime is 86128853. The next prime is 86128873. The reversal of 86128871 is 17882168.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86128871 - 2⁶ = 86128807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86128873) 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 3 ways as a sum of consecutive naturals, for example, 1001456 + ... + 1001541.

It is an arithmetic number, because the mean of its divisors is an integer number (22032978).

Almost surely, 2^86128871 is an apocalyptic number.

86128871 is a deficient number, since it is larger than the sum of its proper divisors (2003041).

86128871 is a wasteful number, since it uses less digits than its factorization.

86128871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003040.

The product of its digits is 43008, while the sum is 41.

The square root of 86128871 is about 9280.5641531105. The cubic root of 86128871 is about 441.6208657541.

The spelling of 86128871 in words is "eighty-six million, one hundred twenty-eight thousand, eight hundred seventy-one".