129772496 has 20 divisors (see below), whose sum is σ = 287353632. Its totient is φ = 55616736.

The previous prime is 129772483. The next prime is 129772523. The reversal of 129772496 is 694277921.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 129772496.

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, 579230 + ... + 579453.

Almost surely, 2^129772496 is an apocalyptic number.

129772496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129772496 is an abundant number, since it is smaller than the sum of its proper divisors (157581136).

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

129772496 is a wasteful number, since it uses less digits than its factorization.

129772496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158698 (or 1158692 counting only the distinct ones).

The product of its digits is 381024, while the sum is 47.

The square root of 129772496 is about 11391.7731718991. The cubic root of 129772496 is about 506.2840193366.

The spelling of 129772496 in words is "one hundred twenty-nine million, seven hundred seventy-two thousand, four hundred ninety-six".