129040984 has 8 divisors (see below), whose sum is σ = 241951860. Its totient is φ = 64520488.

The previous prime is 129040963. The next prime is 129040993. The reversal of 129040984 is 489040921.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8065054 + ... + 8065069.

Almost surely, 2^129040984 is an apocalyptic number.

It is an amenable number.

129040984 is a deficient number, since it is larger than the sum of its proper divisors (112910876).

129040984 is a wasteful number, since it uses less digits than its factorization.

129040984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16130129 (or 16130125 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 129040984 is about 11359.6207683179. The cubic root of 129040984 is about 505.3309388493.

The spelling of 129040984 in words is "one hundred twenty-nine million, forty thousand, nine hundred eighty-four".