129369909 has 8 divisors (see below), whose sum is σ = 172709152. Its totient is φ = 86138640.

The previous prime is 129369907. The next prime is 129369937. The reversal of 129369909 is 909963921.

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

It is not a de Polignac number, because 129369909 - 2¹ = 129369907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129369907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24154 + ... + 29019.

It is an arithmetic number, because the mean of its divisors is an integer number (21588644).

Almost surely, 2^129369909 is an apocalyptic number.

It is an amenable number.

129369909 is a deficient number, since it is larger than the sum of its proper divisors (43339243).

129369909 is an equidigital number, since it uses as much as digits as its factorization.

129369909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53987.

The product of its (nonzero) digits is 236196, while the sum is 48.

The square root of 129369909 is about 11374.0893701430. The cubic root of 129369909 is about 505.7599367940.

The spelling of 129369909 in words is "one hundred twenty-nine million, three hundred sixty-nine thousand, nine hundred nine".