129904089 has 32 divisors (see below), whose sum is σ = 212760576. Its totient is φ = 68808960.

The previous prime is 129904087. The next prime is 129904111. The reversal of 129904089 is 980409921.

It is not a de Polignac number, because 129904089 - 2¹ = 129904087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129904089.

It is not an unprimeable number, because it can be changed into a prime (129904087) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21204 + ... + 26634.

It is an arithmetic number, because the mean of its divisors is an integer number (6648768).

Almost surely, 2^129904089 is an apocalyptic number.

It is an amenable number.

129904089 is a deficient number, since it is larger than the sum of its proper divisors (82856487).

129904089 is a wasteful number, since it uses less digits than its factorization.

129904089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5525.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 129904089 is about 11397.5474993527. The cubic root of 129904089 is about 506.4550903220.

The spelling of 129904089 in words is "one hundred twenty-nine million, nine hundred four thousand, eighty-nine".