129972792 has 16 divisors (see below), whose sum is σ = 324932040. Its totient is φ = 43324256.

The previous prime is 129972763. The next prime is 129972833. The reversal of 129972792 is 297279921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2707743 + ... + 2707790.

Almost surely, 2^129972792 is an apocalyptic number.

129972792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129972792 is an abundant number, since it is smaller than the sum of its proper divisors (194959248).

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

129972792 is a wasteful number, since it uses less digits than its factorization.

129972792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5415542 (or 5415538 counting only the distinct ones).

The product of its digits is 285768, while the sum is 48.

The square root of 129972792 is about 11400.5610388261. The cubic root of 129972792 is about 506.5443583660.

The spelling of 129972792 in words is "one hundred twenty-nine million, nine hundred seventy-two thousand, seven hundred ninety-two".