129433812 has 12 divisors (see below), whose sum is σ = 302012256. Its totient is φ = 43144600.

The previous prime is 129433789. The next prime is 129433813. The reversal of 129433812 is 218334921.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×129433812² = 33506223377702688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129433813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5393064 + ... + 5393087.

It is an arithmetic number, because the mean of its divisors is an integer number (25167688).

Almost surely, 2^129433812 is an apocalyptic number.

129433812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129433812 is an abundant number, since it is smaller than the sum of its proper divisors (172578444).

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

129433812 is a wasteful number, since it uses less digits than its factorization.

129433812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10786158 (or 10786156 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 129433812 is about 11376.8981712943. The cubic root of 129433812 is about 505.8431974159.

The spelling of 129433812 in words is "one hundred twenty-nine million, four hundred thirty-three thousand, eight hundred twelve".