129799826 has 32 divisors (see below), whose sum is σ = 214652928. Its totient is φ = 58501440.

The previous prime is 129799819. The next prime is 129799867. The reversal of 129799826 is 628997921.

129799826 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353495 + ... + 353861.

It is an arithmetic number, because the mean of its divisors is an integer number (6707904).

Almost surely, 2^129799826 is an apocalyptic number.

129799826 is a deficient number, since it is larger than the sum of its proper divisors (84853102).

129799826 is a wasteful number, since it uses less digits than its factorization.

129799826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666.

The product of its digits is 979776, while the sum is 53.

The square root of 129799826 is about 11392.9726586172. The cubic root of 129799826 is about 506.3195578661.

The spelling of 129799826 in words is "one hundred twenty-nine million, seven hundred ninety-nine thousand, eight hundred twenty-six".