86239889 has 2 divisors, whose sum is σ = 86239890. Its totient is φ = 86239888.

The previous prime is 86239871. The next prime is 86239931. The reversal of 86239889 is 98893268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63123025 + 23116864 = 7945^2 + 4808^2 .

It is a cyclic number.

It is not a de Polignac number, because 86239889 - 2⁸ = 86239633 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86239889.

It is not a weakly prime, because it can be changed into another prime (86239849) 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, 43119944 + 43119945.

It is an arithmetic number, because the mean of its divisors is an integer number (43119945).

Almost surely, 2^86239889 is an apocalyptic number.

It is an amenable number.

86239889 is a deficient number, since it is larger than the sum of its proper divisors (1).

86239889 is an equidigital number, since it uses as much as digits as its factorization.

86239889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 53.

The square root of 86239889 is about 9286.5434366076. The cubic root of 86239889 is about 441.8105304374.

The spelling of 86239889 in words is "eighty-six million, two hundred thirty-nine thousand, eight hundred eighty-nine".