129817543013 has 2 divisors, whose sum is σ = 129817543014. Its totient is φ = 129817543012.

The previous prime is 129817542973. The next prime is 129817543033. The reversal of 129817543013 is 310345718921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124818770209 + 4998772804 = 353297^2 + 70702^2 .

It is a cyclic number.

It is not a de Polignac number, because 129817543013 - 2⁶ = 129817542949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129817543033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64908771506 + 64908771507.

It is an arithmetic number, because the mean of its divisors is an integer number (64908771507).

Almost surely, 2^129817543013 is an apocalyptic number.

It is an amenable number.

129817543013 is a deficient number, since it is larger than the sum of its proper divisors (1).

129817543013 is an equidigital number, since it uses as much as digits as its factorization.

129817543013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 129817543013 in words is "one hundred twenty-nine billion, eight hundred seventeen million, five hundred forty-three thousand, thirteen".