86695729 has 2 divisors, whose sum is σ = 86695730. Its totient is φ = 86695728.

The previous prime is 86695711. The next prime is 86695753. The reversal of 86695729 is 92759668.

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., 82901025 + 3794704 = 9105^2 + 1948^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86695729 is a prime.

It is a super-2 number, since 2×86695729² = 15032298853682882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86695129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43347864 + 43347865.

It is an arithmetic number, because the mean of its divisors is an integer number (43347865).

Almost surely, 2^86695729 is an apocalyptic number.

It is an amenable number.

86695729 is a deficient number, since it is larger than the sum of its proper divisors (1).

86695729 is an equidigital number, since it uses as much as digits as its factorization.

86695729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 52.

The square root of 86695729 is about 9311.0541293669. The cubic root of 86695729 is about 442.5875920104.

The spelling of 86695729 in words is "eighty-six million, six hundred ninety-five thousand, seven hundred twenty-nine".