86566729 has 2 divisors, whose sum is σ = 86566730. Its totient is φ = 86566728.

The previous prime is 86566721. The next prime is 86566741. The reversal of 86566729 is 92766568.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86490000 + 76729 = 9300^2 + 277^2 .

It is a cyclic number.

It is not a de Polignac number, because 86566729 - 2³ = 86566721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86566721) 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, 43283364 + 43283365.

It is an arithmetic number, because the mean of its divisors is an integer number (43283365).

Almost surely, 2^86566729 is an apocalyptic number.

It is an amenable number.

86566729 is a deficient number, since it is larger than the sum of its proper divisors (1).

86566729 is an equidigital number, since it uses as much as digits as its factorization.

86566729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 49.

The square root of 86566729 is about 9304.1243005454. The cubic root of 86566729 is about 442.3679651181.

The spelling of 86566729 in words is "eighty-six million, five hundred sixty-six thousand, seven hundred twenty-nine".