86239529 has 2 divisors, whose sum is σ = 86239530. Its totient is φ = 86239528.

The previous prime is 86239507. The next prime is 86239547. The reversal of 86239529 is 92593268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85525504 + 714025 = 9248^2 + 845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86239529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86239529.

It is not a weakly prime, because it can be changed into another prime (86239579) 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, 43119764 + 43119765.

It is an arithmetic number, because the mean of its divisors is an integer number (43119765).

Almost surely, 2^86239529 is an apocalyptic number.

It is an amenable number.

86239529 is a deficient number, since it is larger than the sum of its proper divisors (1).

86239529 is an equidigital number, since it uses as much as digits as its factorization.

86239529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 44.

The square root of 86239529 is about 9286.5240537028. The cubic root of 86239529 is about 441.8099156715.

It can be divided in two parts, 86239 and 529, that added together give a palindrome (86768).

The spelling of 86239529 in words is "eighty-six million, two hundred thirty-nine thousand, five hundred twenty-nine".