129605706 has 12 divisors (see below), whose sum is σ = 280812402. Its totient is φ = 43201896.

The previous prime is 129605599. The next prime is 129605731. The reversal of 129605706 is 607506921.

129605706 is a `hidden beast` number, since 1 + 29 + 60 + 570 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 98903025 + 30702681 = 9945^2 + 5541^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3600141 + ... + 3600176.

Almost surely, 2^129605706 is an apocalyptic number.

129605706 is an abundant number, since it is smaller than the sum of its proper divisors (151206696).

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

129605706 is a wasteful number, since it uses less digits than its factorization.

129605706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7200325 (or 7200322 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 129605706 is about 11384.4501843523. The cubic root of 129605706 is about 506.0670259652.

The spelling of 129605706 in words is "one hundred twenty-nine million, six hundred five thousand, seven hundred six".