129968992 has 24 divisors (see below), whose sum is σ = 256132800. Its totient is φ = 64919424.

The previous prime is 129968989. The next prime is 129969071. The reversal of 129968992 is 299869921.

It is a congruent number.

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, 55134 + ... + 57442.

It is an arithmetic number, because the mean of its divisors is an integer number (10672200).

Almost surely, 2^129968992 is an apocalyptic number.

It is an amenable number.

129968992 is a deficient number, since it is larger than the sum of its proper divisors (126163808).

129968992 is a wasteful number, since it uses less digits than its factorization.

129968992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4078 (or 4070 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 55.

The square root of 129968992 is about 11400.3943791432. The cubic root of 129968992 is about 506.5394217243.

The spelling of 129968992 in words is "one hundred twenty-nine million, nine hundred sixty-eight thousand, nine hundred ninety-two".