129813804 has 18 divisors (see below), whose sum is σ = 328140540. Its totient is φ = 43271256.

The previous prime is 129813799. The next prime is 129813811. The reversal of 129813804 is 408318921.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3605939 = 129813804 / (1 + 2 + 9 + 8 + 1 + 3 + 8 + 0 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1802934 + ... + 1803005.

It is an arithmetic number, because the mean of its divisors is an integer number (18230030).

Almost surely, 2^129813804 is an apocalyptic number.

It is an amenable number.

129813804 is an abundant number, since it is smaller than the sum of its proper divisors (198326736).

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

129813804 is a wasteful number, since it uses less digits than its factorization.

129813804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3605949 (or 3605944 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 129813804 is about 11393.5860904282. The cubic root of 129813804 is about 506.3377322118.

The spelling of 129813804 in words is "one hundred twenty-nine million, eight hundred thirteen thousand, eight hundred four".