129513209 has 16 divisors (see below), whose sum is σ = 153551616. Its totient is φ = 106920000.

The previous prime is 129513179. The next prime is 129513221. The reversal of 129513209 is 902315921.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129513209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129513269) 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 15 ways as a sum of consecutive naturals, for example, 23684 + ... + 28634.

It is an arithmetic number, because the mean of its divisors is an integer number (9596976).

Almost surely, 2^129513209 is an apocalyptic number.

It is an amenable number.

129513209 is a deficient number, since it is larger than the sum of its proper divisors (24038407).

129513209 is a wasteful number, since it uses less digits than its factorization.

129513209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5096.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 129513209 is about 11380.3870320829. The cubic root of 129513209 is about 505.9466073426.

The spelling of 129513209 in words is "one hundred twenty-nine million, five hundred thirteen thousand, two hundred nine".