129708842513 has 2 divisors, whose sum is σ = 129708842514. Its totient is φ = 129708842512.

The previous prime is 129708842489. The next prime is 129708842533. The reversal of 129708842513 is 315248807921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120639518224 + 9069324289 = 347332^2 + 95233^2 .

It is a cyclic number.

It is not a de Polignac number, because 129708842513 - 2⁶ = 129708842449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (129708842533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64854421256 + 64854421257.

It is an arithmetic number, because the mean of its divisors is an integer number (64854421257).

Almost surely, 2^129708842513 is an apocalyptic number.

It is an amenable number.

129708842513 is a deficient number, since it is larger than the sum of its proper divisors (1).

129708842513 is an equidigital number, since it uses as much as digits as its factorization.

129708842513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 129708842513 in words is "one hundred twenty-nine billion, seven hundred eight million, eight hundred forty-two thousand, five hundred thirteen".