129899266 has 16 divisors (see below), whose sum is σ = 225736704. Its totient is φ = 54908064.

The previous prime is 129899251. The next prime is 129899279. The reversal of 129899266 is 662998921.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62530 + ... + 64573.

It is an arithmetic number, because the mean of its divisors is an integer number (14108544).

Almost surely, 2^129899266 is an apocalyptic number.

129899266 is a deficient number, since it is larger than the sum of its proper divisors (95837438).

129899266 is a wasteful number, since it uses less digits than its factorization.

129899266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127185.

The product of its digits is 839808, while the sum is 52.

The square root of 129899266 is about 11397.3359167834. The cubic root of 129899266 is about 506.4488224589.

The spelling of 129899266 in words is "one hundred twenty-nine million, eight hundred ninety-nine thousand, two hundred sixty-six".