86171867 has 2 divisors, whose sum is σ = 86171868. Its totient is φ = 86171866.

The previous prime is 86171863. The next prime is 86171881. The reversal of 86171867 is 76817168.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86171867 - 2² = 86171863 is a prime.

It is not a weakly prime, because it can be changed into another prime (86171863) 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 as a sum of consecutive naturals, namely, 43085933 + 43085934.

It is an arithmetic number, because the mean of its divisors is an integer number (43085934).

Almost surely, 2^86171867 is an apocalyptic number.

86171867 is a deficient number, since it is larger than the sum of its proper divisors (1).

86171867 is an equidigital number, since it uses as much as digits as its factorization.

86171867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 44.

The square root of 86171867 is about 9282.8803180909. The cubic root of 86171867 is about 441.6943400405.

The spelling of 86171867 in words is "eighty-six million, one hundred seventy-one thousand, eight hundred sixty-seven".