129788684 has 6 divisors (see below), whose sum is σ = 227130204. Its totient is φ = 64894340.

The previous prime is 129788669. The next prime is 129788767. The reversal of 129788684 is 486887921.

It is a happy number.

129788684 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16223582 + ... + 16223589.

It is an arithmetic number, because the mean of its divisors is an integer number (37855034).

Almost surely, 2^129788684 is an apocalyptic number.

It is an amenable number.

129788684 is a deficient number, since it is larger than the sum of its proper divisors (97341520).

129788684 is a wasteful number, since it uses less digits than its factorization.

129788684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32447175 (or 32447173 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 53.

The square root of 129788684 is about 11392.4836624855. The cubic root of 129788684 is about 506.3050699834.

The spelling of 129788684 in words is "one hundred twenty-nine million, seven hundred eighty-eight thousand, six hundred eighty-four".