129605684 has 12 divisors (see below), whose sum is σ = 244256964. Its totient is φ = 59817984.

The previous prime is 129605599. The next prime is 129605731. The reversal of 129605684 is 486506921.

It is a happy number.

129605684 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 70930084 + 58675600 = 8422^2 + 7660^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1246157 + ... + 1246260.

It is an arithmetic number, because the mean of its divisors is an integer number (20354747).

Almost surely, 2^129605684 is an apocalyptic number.

It is an amenable number.

129605684 is a deficient number, since it is larger than the sum of its proper divisors (114651280).

129605684 is a wasteful number, since it uses less digits than its factorization.

129605684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492434 (or 2492432 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 129605684 is about 11384.4492181221. The cubic root of 129605684 is about 506.0669973310.

The spelling of 129605684 in words is "one hundred twenty-nine million, six hundred five thousand, six hundred eighty-four".