2539591729 has 2 divisors, whose sum is σ = 2539591730. Its totient is φ = 2539591728.

The previous prime is 2539591723. The next prime is 2539591751. The reversal of 2539591729 is 9271959352.

2539591729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2521546225 + 18045504 = 50215^2 + 4248^2 .

It is a cyclic number.

It is not a de Polignac number, because 2539591729 - 2⁹ = 2539591217 is a prime.

It is not a weakly prime, because it can be changed into another prime (2539591723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269795864 + 1269795865.

It is an arithmetic number, because the mean of its divisors is an integer number (1269795865).

Almost surely, 2^2539591729 is an apocalyptic number.

It is an amenable number.

2539591729 is a deficient number, since it is larger than the sum of its proper divisors (1).

2539591729 is an equidigital number, since it uses as much as digits as its factorization.

2539591729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1530900, while the sum is 52.

The square root of 2539591729 is about 50394.3620755338. The cubic root of 2539591729 is about 1364.3358823516.

The spelling of 2539591729 in words is "two billion, five hundred thirty-nine million, five hundred ninety-one thousand, seven hundred twenty-nine".