129076868 has 12 divisors (see below), whose sum is σ = 231989772. Its totient is φ = 62794080.

The previous prime is 129076859. The next prime is 129076873. The reversal of 129076868 is 868670921.

It can be written as a sum of positive squares in 2 ways, for example, as 82591744 + 46485124 = 9088^2 + 6818^2 .

It is an unprimeable number.

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, 435923 + ... + 436218.

It is an arithmetic number, because the mean of its divisors is an integer number (19332481).

Almost surely, 2^129076868 is an apocalyptic number.

It is an amenable number.

129076868 is a deficient number, since it is larger than the sum of its proper divisors (102912904).

129076868 is a wasteful number, since it uses less digits than its factorization.

129076868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872182 (or 872180 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 129076868 is about 11361.2001126642. The cubic root of 129076868 is about 505.3777756869.

The spelling of 129076868 in words is "one hundred twenty-nine million, seventy-six thousand, eight hundred sixty-eight".