129659904 has 132 divisors (see below), whose sum is σ = 408744960. Its totient is φ = 39260160.

The previous prime is 129659891. The next prime is 129659923. The reversal of 129659904 is 409956921.

It is a tau number, because it is divible by the number of its divisors (132).

It is a self number, because there is not a number n which added to its sum of digits gives 129659904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100737 + ... + 102015.

Almost surely, 2^129659904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129659904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204372480).

129659904 is an abundant number, since it is smaller than the sum of its proper divisors (279085056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129659904 is a wasteful number, since it uses less digits than its factorization.

129659904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316 (or 1295 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 129659904 is about 11386.8302876613. The cubic root of 129659904 is about 506.1375578350.

The spelling of 129659904 in words is "one hundred twenty-nine million, six hundred fifty-nine thousand, nine hundred four".