129872329 has 8 divisors (see below), whose sum is σ = 137377152. Its totient is φ = 122522400.

The previous prime is 129872317. The next prime is 129872339. The reversal of 129872329 is 923278921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129872329 - 2⁹ = 129871817 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129872339) 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 in 7 ways as a sum of consecutive naturals, for example, 36997 + ... + 40354.

It is an arithmetic number, because the mean of its divisors is an integer number (17172144).

Almost surely, 2^129872329 is an apocalyptic number.

It is an amenable number.

129872329 is a deficient number, since it is larger than the sum of its proper divisors (7504823).

129872329 is an equidigital number, since it uses as much as digits as its factorization.

129872329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77447.

The product of its digits is 108864, while the sum is 43.

The square root of 129872329 is about 11396.1541319868. The cubic root of 129872329 is about 506.4138128820.

The spelling of 129872329 in words is "one hundred twenty-nine million, eight hundred seventy-two thousand, three hundred twenty-nine".