999839068729 has 2 divisors, whose sum is σ = 999839068730. Its totient is φ = 999839068728.

The previous prime is 999839068699. The next prime is 999839068741. The reversal of 999839068729 is 927860938999.

999839068729 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., 993115888704 + 6723180025 = 996552^2 + 81995^2 .

It is a cyclic number.

It is not a de Polignac number, because 999839068729 - 2⁷ = 999839068601 is a prime.

It is not a weakly prime, because it can be changed into another prime (999839038729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499919534364 + 499919534365.

It is an arithmetic number, because the mean of its divisors is an integer number (499919534365).

Almost surely, 2^999839068729 is an apocalyptic number.

It is an amenable number.

999839068729 is a deficient number, since it is larger than the sum of its proper divisors (1).

999839068729 is an equidigital number, since it uses as much as digits as its factorization.

999839068729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 952342272, while the sum is 79.

The spelling of 999839068729 in words is "nine hundred ninety-nine billion, eight hundred thirty-nine million, sixty-eight thousand, seven hundred twenty-nine".