86239 has 2 divisors, whose sum is σ = 86240. Its totient is φ = 86238.

The previous prime is 86209. The next prime is 86243. The reversal of 86239 is 93268.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86239 - 2⁷ = 86111 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86209) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43119 + 43120.

It is an arithmetic number, because the mean of its divisors is an integer number (43120).

2⁸⁶²³⁹ is an apocalyptic number.

86239 is a deficient number, since it is larger than the sum of its proper divisors (1).

86239 is an equidigital number, since it uses as much as digits as its factorization.

86239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 86239 is about 293.6647748709. The cubic root of 86239 is about 44.1809012304.

Adding to 86239 its product of digits (2592), we get a triangular number (88831 = T₄₂₁).

It can be divided in two parts, 86 and 239, that added together give a triangular number (325 = T₂₅).

The spelling of 86239 in words is "eighty-six thousand, two hundred thirty-nine".