129396812 has 12 divisors (see below), whose sum is σ = 228561480. Its totient is φ = 64093536.

The previous prime is 129396803. The next prime is 129396823. The reversal of 129396812 is 218693921.

It is a self number, because there is not a number n which added to its sum of digits gives 129396812.

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, 150737 + ... + 151592.

It is an arithmetic number, because the mean of its divisors is an integer number (19046790).

Almost surely, 2^129396812 is an apocalyptic number.

It is an amenable number.

129396812 is a deficient number, since it is larger than the sum of its proper divisors (99164668).

129396812 is a wasteful number, since it uses less digits than its factorization.

129396812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302440 (or 302438 counting only the distinct ones).

The product of its digits is 46656, while the sum is 41.

The square root of 129396812 is about 11375.2719527930. The cubic root of 129396812 is about 505.7949926444.

The spelling of 129396812 in words is "one hundred twenty-nine million, three hundred ninety-six thousand, eight hundred twelve".