129684976 has 20 divisors (see below), whose sum is σ = 266045472. Its totient is φ = 61028096.

The previous prime is 129684953. The next prime is 129685007. The reversal of 129684976 is 679486921.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238120 + ... + 238663.

Almost surely, 2^129684976 is an apocalyptic number.

129684976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129684976 is an abundant number, since it is smaller than the sum of its proper divisors (136360496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129684976 is a wasteful number, since it uses less digits than its factorization.

129684976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476808 (or 476802 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 52.

The square root of 129684976 is about 11387.9311553943. The cubic root of 129684976 is about 506.1701792356.

The spelling of 129684976 in words is "one hundred twenty-nine million, six hundred eighty-four thousand, nine hundred seventy-six".