129687388 has 24 divisors (see below), whose sum is σ = 241027920. Its totient is φ = 60883200.

The previous prime is 129687361. The next prime is 129687413. The reversal of 129687388 is 883786921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1038 + ... + 16138.

It is an arithmetic number, because the mean of its divisors is an integer number (10042830).

Almost surely, 2^129687388 is an apocalyptic number.

It is an amenable number.

129687388 is a deficient number, since it is larger than the sum of its proper divisors (111340532).

129687388 is a wasteful number, since it uses less digits than its factorization.

129687388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15237 (or 15235 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 52.

The square root of 129687388 is about 11388.0370564905. The cubic root of 129687388 is about 506.1733172884.

The spelling of 129687388 in words is "one hundred twenty-nine million, six hundred eighty-seven thousand, three hundred eighty-eight".