129399832 has 16 divisors (see below), whose sum is σ = 244115640. Its totient is φ = 64302336.

The previous prime is 129399811. The next prime is 129399833. The reversal of 129399832 is 238993921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129399833) 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, 48313 + ... + 50920.

Almost surely, 2^129399832 is an apocalyptic number.

It is an amenable number.

129399832 is a deficient number, since it is larger than the sum of its proper divisors (114715808).

129399832 is a wasteful number, since it uses less digits than its factorization.

129399832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99402 (or 99398 counting only the distinct ones).

The product of its digits is 209952, while the sum is 46.

The square root of 129399832 is about 11375.4046960976. The cubic root of 129399832 is about 505.7989275404.

The spelling of 129399832 in words is "one hundred twenty-nine million, three hundred ninety-nine thousand, eight hundred thirty-two".