129069917 has 2 divisors, whose sum is σ = 129069918. Its totient is φ = 129069916.

The previous prime is 129069911. The next prime is 129069929. The reversal of 129069917 is 719960921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121638841 + 7431076 = 11029^2 + 2726^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129069917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129069911) 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, 64534958 + 64534959.

It is an arithmetic number, because the mean of its divisors is an integer number (64534959).

Almost surely, 2^129069917 is an apocalyptic number.

It is an amenable number.

129069917 is a deficient number, since it is larger than the sum of its proper divisors (1).

129069917 is an equidigital number, since it uses as much as digits as its factorization.

129069917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 44.

The square root of 129069917 is about 11360.8941989616. The cubic root of 129069917 is about 505.3687037181.

The spelling of 129069917 in words is "one hundred twenty-nine million, sixty-nine thousand, nine hundred seventeen".