86686559 has 2 divisors, whose sum is σ = 86686560. Its totient is φ = 86686558.

The previous prime is 86686549. The next prime is 86686573. The reversal of 86686559 is 95568668.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86686559 - 2¹⁶ = 86621023 is a prime.

It is a super-2 number, since 2×86686559² = 15029119022520962, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 86686559.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86686549) 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, 43343279 + 43343280.

It is an arithmetic number, because the mean of its divisors is an integer number (43343280).

Almost surely, 2^86686559 is an apocalyptic number.

86686559 is a deficient number, since it is larger than the sum of its proper divisors (1).

86686559 is an equidigital number, since it uses as much as digits as its factorization.

86686559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3110400, while the sum is 53.

The square root of 86686559 is about 9310.5616908971. The cubic root of 86686559 is about 442.5719869690.

The spelling of 86686559 in words is "eighty-six million, six hundred eighty-six thousand, five hundred fifty-nine".