86171939 has 12 divisors (see below), whose sum is σ = 100548000. Its totient is φ = 73635408.

The previous prime is 86171933. The next prime is 86171947. The reversal of 86171939 is 93917168.

It is not a de Polignac number, because 86171939 - 2⁴ = 86171923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86171939.

It is not an unprimeable number, because it can be changed into a prime (86171933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14582 + ... + 19620.

It is an arithmetic number, because the mean of its divisors is an integer number (8379000).

Almost surely, 2^86171939 is an apocalyptic number.

86171939 is a deficient number, since it is larger than the sum of its proper divisors (14376061).

86171939 is a wasteful number, since it uses less digits than its factorization.

86171939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5402 (or 5395 counting only the distinct ones).

The product of its digits is 81648, while the sum is 44.

The square root of 86171939 is about 9282.8841961968. The cubic root of 86171939 is about 441.6944630582.

The spelling of 86171939 in words is "eighty-six million, one hundred seventy-one thousand, nine hundred thirty-nine".