129411976 has 8 divisors (see below), whose sum is σ = 242647470. Its totient is φ = 64705984.

The previous prime is 129411943. The next prime is 129411979. The reversal of 129411976 is 679114921.

It can be written as a sum of positive squares in only one way, i.e., 129367876 + 44100 = 11374^2 + 210^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (129411979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8088241 + ... + 8088256.

Almost surely, 2^129411976 is an apocalyptic number.

It is an amenable number.

129411976 is a deficient number, since it is larger than the sum of its proper divisors (113235494).

129411976 is a wasteful number, since it uses less digits than its factorization.

129411976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16176503 (or 16176499 counting only the distinct ones).

The product of its digits is 27216, while the sum is 40.

The square root of 129411976 is about 11375.9384667815. The cubic root of 129411976 is about 505.8147498949.

The spelling of 129411976 in words is "one hundred twenty-nine million, four hundred eleven thousand, nine hundred seventy-six".