129720792 has 16 divisors (see below), whose sum is σ = 324302040. Its totient is φ = 43240256.

The previous prime is 129720743. The next prime is 129720797. The reversal of 129720792 is 297027921.

It is a self number, because there is not a number n which added to its sum of digits gives 129720792.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129720797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2702493 + ... + 2702540.

Almost surely, 2^129720792 is an apocalyptic number.

129720792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129720792 is an abundant number, since it is smaller than the sum of its proper divisors (194581248).

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

129720792 is a wasteful number, since it uses less digits than its factorization.

129720792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5405042 (or 5405038 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 129720792 is about 11389.5035888313. The cubic root of 129720792 is about 506.2167724572.

The spelling of 129720792 in words is "one hundred twenty-nine million, seven hundred twenty thousand, seven hundred ninety-two".