129396329 has 2 divisors, whose sum is σ = 129396330. Its totient is φ = 129396328.

The previous prime is 129396307. The next prime is 129396349. The reversal of 129396329 is 923693921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64963600 + 64432729 = 8060^2 + 8027^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129396329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129396329.

It is not a weakly prime, because it can be changed into another prime (129396349) 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, 64698164 + 64698165.

It is an arithmetic number, because the mean of its divisors is an integer number (64698165).

Almost surely, 2^129396329 is an apocalyptic number.

It is an amenable number.

129396329 is a deficient number, since it is larger than the sum of its proper divisors (1).

129396329 is an equidigital number, since it uses as much as digits as its factorization.

129396329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 44.

The square root of 129396329 is about 11375.2507225116. The cubic root of 129396329 is about 505.7943633159.

The spelling of 129396329 in words is "one hundred twenty-nine million, three hundred ninety-six thousand, three hundred twenty-nine".