129058209 has 48 divisors (see below), whose sum is σ = 220147200. Its totient is φ = 72817920.

The previous prime is 129058133. The next prime is 129058213. The reversal of 129058209 is 902850921.

It is not a de Polignac number, because 129058209 - 2⁷ = 129058081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129058219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 299224 + ... + 299654.

It is an arithmetic number, because the mean of its divisors is an integer number (4586400).

Almost surely, 2^129058209 is an apocalyptic number.

It is an amenable number.

129058209 is a deficient number, since it is larger than the sum of its proper divisors (91088991).

129058209 is an equidigital number, since it uses as much as digits as its factorization.

129058209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 129058209 is about 11360.3789109343. The cubic root of 129058209 is about 505.3534225024.

The spelling of 129058209 in words is "one hundred twenty-nine million, fifty-eight thousand, two hundred nine".