128969829929 has 2 divisors, whose sum is σ = 128969829930. Its totient is φ = 128969829928.

The previous prime is 128969829889. The next prime is 128969830061. The reversal of 128969829929 is 929928969821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124132905625 + 4836924304 = 352325^2 + 69548^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128969829929 is a prime.

It is not a weakly prime, because it can be changed into another prime (128969829829) 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, 64484914964 + 64484914965.

It is an arithmetic number, because the mean of its divisors is an integer number (64484914965).

Almost surely, 2^128969829929 is an apocalyptic number.

It is an amenable number.

128969829929 is a deficient number, since it is larger than the sum of its proper divisors (1).

128969829929 is an equidigital number, since it uses as much as digits as its factorization.

128969829929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181398528, while the sum is 74.

The spelling of 128969829929 in words is "one hundred twenty-eight billion, nine hundred sixty-nine million, eight hundred twenty-nine thousand, nine hundred twenty-nine".