8729086817 has 16 divisors (see below), whose sum is σ = 9755319552. Its totient is φ = 7742059920.

The previous prime is 8729086813. The next prime is 8729086823. The reversal of 8729086817 is 7186809278.

It is a cyclic number.

It is not a de Polignac number, because 8729086817 - 2² = 8729086813 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8729086811) 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 in 15 ways as a sum of consecutive naturals, for example, 418838 + ... + 439184.

It is an arithmetic number, because the mean of its divisors is an integer number (609707472).

Almost surely, 2^8729086817 is an apocalyptic number.

It is an amenable number.

8729086817 is a deficient number, since it is larger than the sum of its proper divisors (1026232735).

8729086817 is a wasteful number, since it uses less digits than its factorization.

8729086817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21308.

The product of its (nonzero) digits is 2709504, while the sum is 56.

The square root of 8729086817 is about 93429.5821300727. The cubic root of 8729086817 is about 2058.9996413082. Note that the first 3 decimals are identical.

The spelling of 8729086817 in words is "eight billion, seven hundred twenty-nine million, eighty-six thousand, eight hundred seventeen".