129872396 has 6 divisors (see below), whose sum is σ = 227276700. Its totient is φ = 64936196.

The previous prime is 129872381. The next prime is 129872417. The reversal of 129872396 is 693278921.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 129872396.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16234046 + ... + 16234053.

It is an arithmetic number, because the mean of its divisors is an integer number (37879450).

Almost surely, 2^129872396 is an apocalyptic number.

It is an amenable number.

129872396 is a deficient number, since it is larger than the sum of its proper divisors (97404304).

129872396 is a wasteful number, since it uses less digits than its factorization.

129872396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32468103 (or 32468101 counting only the distinct ones).

The product of its digits is 326592, while the sum is 47.

The square root of 129872396 is about 11396.1570715746. The cubic root of 129872396 is about 506.4138999668.

The spelling of 129872396 in words is "one hundred twenty-nine million, eight hundred seventy-two thousand, three hundred ninety-six".