129300109 has 2 divisors, whose sum is σ = 129300110. Its totient is φ = 129300108.

The previous prime is 129300107. The next prime is 129300133. The reversal of 129300109 is 901003921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128255625 + 1044484 = 11325^2 + 1022^2 .

It is a cyclic number.

It is not a de Polignac number, because 129300109 - 2¹ = 129300107 is a prime.

Together with 129300107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129300107) 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, 64650054 + 64650055.

It is an arithmetic number, because the mean of its divisors is an integer number (64650055).

Almost surely, 2^129300109 is an apocalyptic number.

It is an amenable number.

129300109 is a deficient number, since it is larger than the sum of its proper divisors (1).

129300109 is an equidigital number, since it uses as much as digits as its factorization.

129300109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 129300109 is about 11371.0205786464. The cubic root of 129300109 is about 505.6689615054.

The spelling of 129300109 in words is "one hundred twenty-nine million, three hundred thousand, one hundred nine".