129959319989 has 2 divisors, whose sum is σ = 129959319990. Its totient is φ = 129959319988.

The previous prime is 129959319983. The next prime is 129959320003. The reversal of 129959319989 is 989913959921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93776812900 + 36182507089 = 306230^2 + 190217^2 .

It is a cyclic number.

It is not a de Polignac number, because 129959319989 - 2³⁶ = 61239843253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129959319983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64979659994 + 64979659995.

It is an arithmetic number, because the mean of its divisors is an integer number (64979659995).

Almost surely, 2^129959319989 is an apocalyptic number.

It is an amenable number.

129959319989 is a deficient number, since it is larger than the sum of its proper divisors (1).

129959319989 is an equidigital number, since it uses as much as digits as its factorization.

129959319989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127545840, while the sum is 74.

The spelling of 129959319989 in words is "one hundred twenty-nine billion, nine hundred fifty-nine million, three hundred nineteen thousand, nine hundred eighty-nine".