129906788 has 12 divisors (see below), whose sum is σ = 248003952. Its totient is φ = 59048520.

The previous prime is 129906773. The next prime is 129906797. The reversal of 129906788 is 887609921.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1476170 + ... + 1476257.

It is an arithmetic number, because the mean of its divisors is an integer number (20666996).

Almost surely, 2^129906788 is an apocalyptic number.

It is an amenable number.

129906788 is a deficient number, since it is larger than the sum of its proper divisors (118097164).

129906788 is a wasteful number, since it uses less digits than its factorization.

129906788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2952442 (or 2952440 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 129906788 is about 11397.6659014028. The cubic root of 129906788 is about 506.4585978144.

The spelling of 129906788 in words is "one hundred twenty-nine million, nine hundred six thousand, seven hundred eighty-eight".