129371317 has 2 divisors, whose sum is σ = 129371318. Its totient is φ = 129371316.

The previous prime is 129371299. The next prime is 129371371. The reversal of 129371317 is 713173921.

Together with next prime (129371371) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113934276 + 15437041 = 10674^2 + 3929^2 .

It is an emirp because it is prime and its reverse (713173921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129371317 - 2⁷ = 129371189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129371387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64685658 + 64685659.

It is an arithmetic number, because the mean of its divisors is an integer number (64685659).

Almost surely, 2^129371317 is an apocalyptic number.

It is an amenable number.

129371317 is a deficient number, since it is larger than the sum of its proper divisors (1).

129371317 is an equidigital number, since it uses as much as digits as its factorization.

129371317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7938, while the sum is 34.

The square root of 129371317 is about 11374.1512650395. The cubic root of 129371317 is about 505.7617716035.

The spelling of 129371317 in words is "one hundred twenty-nine million, three hundred seventy-one thousand, three hundred seventeen".