129638347913 has 2 divisors, whose sum is σ = 129638347914. Its totient is φ = 129638347912.

The previous prime is 129638347889. The next prime is 129638347931. The reversal of 129638347913 is 319743836921.

Together with next prime (129638347931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99182164624 + 30456183289 = 314932^2 + 174517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129638347913 is a prime.

It is a super-2 number, since 2×129638347913² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129638347933) 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, 64819173956 + 64819173957.

It is an arithmetic number, because the mean of its divisors is an integer number (64819173957).

Almost surely, 2^129638347913 is an apocalyptic number.

It is an amenable number.

129638347913 is a deficient number, since it is larger than the sum of its proper divisors (1).

129638347913 is an equidigital number, since it uses as much as digits as its factorization.

129638347913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 56.

The spelling of 129638347913 in words is "one hundred twenty-nine billion, six hundred thirty-eight million, three hundred forty-seven thousand, nine hundred thirteen".