129931368 has 64 divisors (see below), whose sum is σ = 384048000. Its totient is φ = 35841792.

The previous prime is 129931297. The next prime is 129931381. The reversal of 129931368 is 863139921.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8463 + ... + 18206.

It is an arithmetic number, because the mean of its divisors is an integer number (6000750).

Almost surely, 2^129931368 is an apocalyptic number.

It is an amenable number.

129931368 is an abundant number, since it is smaller than the sum of its proper divisors (254116632).

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

129931368 is a wasteful number, since it uses less digits than its factorization.

129931368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26714 (or 26710 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The square root of 129931368 is about 11398.7441413517. The cubic root of 129931368 is about 506.4905385812.

The spelling of 129931368 in words is "one hundred twenty-nine million, nine hundred thirty-one thousand, three hundred sixty-eight".