86239871 has 2 divisors, whose sum is σ = 86239872. Its totient is φ = 86239870.

The previous prime is 86239849. The next prime is 86239889. The reversal of 86239871 is 17893268.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86239871 - 2⁶ = 86239807 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86239801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43119935 + 43119936.

It is an arithmetic number, because the mean of its divisors is an integer number (43119936).

Almost surely, 2^86239871 is an apocalyptic number.

86239871 is a deficient number, since it is larger than the sum of its proper divisors (1).

86239871 is an equidigital number, since it uses as much as digits as its factorization.

86239871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 86239871 is about 9286.5424674633. The cubic root of 86239871 is about 441.8104996991.

The spelling of 86239871 in words is "eighty-six million, two hundred thirty-nine thousand, eight hundred seventy-one".