129898333109 has 2 divisors, whose sum is σ = 129898333110. Its totient is φ = 129898333108.

The previous prime is 129898333093. The next prime is 129898333111. The reversal of 129898333109 is 901333898921.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78107952484 + 51790380625 = 279478^2 + 227575^2 .

It is a cyclic number.

It is not a de Polignac number, because 129898333109 - 2⁴ = 129898333093 is a prime.

Together with 129898333111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129898333139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64949166554 + 64949166555.

It is an arithmetic number, because the mean of its divisors is an integer number (64949166555).

Almost surely, 2^129898333109 is an apocalyptic number.

It is an amenable number.

129898333109 is a deficient number, since it is larger than the sum of its proper divisors (1).

129898333109 is an equidigital number, since it uses as much as digits as its factorization.

129898333109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2519424, while the sum is 56.

The spelling of 129898333109 in words is "one hundred twenty-nine billion, eight hundred ninety-eight million, three hundred thirty-three thousand, one hundred nine".