8709928729 has 2 divisors, whose sum is σ = 8709928730. Its totient is φ = 8709928728.

The previous prime is 8709928691. The next prime is 8709928753. The reversal of 8709928729 is 9278299078.

8709928729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7008201225 + 1701727504 = 83715^2 + 41252^2 .

It is a cyclic number.

It is not a de Polignac number, because 8709928729 - 2²³ = 8701540121 is a prime.

It is not a weakly prime, because it can be changed into another prime (8709929729) 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, 4354964364 + 4354964365.

It is an arithmetic number, because the mean of its divisors is an integer number (4354964365).

Almost surely, 2^8709928729 is an apocalyptic number.

It is an amenable number.

8709928729 is a deficient number, since it is larger than the sum of its proper divisors (1).

8709928729 is an equidigital number, since it uses as much as digits as its factorization.

8709928729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9144576, while the sum is 61.

The square root of 8709928729 is about 93326.9989284987. The cubic root of 8709928729 is about 2057.4922140644.

The spelling of 8709928729 in words is "eight billion, seven hundred nine million, nine hundred twenty-eight thousand, seven hundred twenty-nine".