129904766 has 4 divisors (see below), whose sum is σ = 194857152. Its totient is φ = 64952382.

The previous prime is 129904751. The next prime is 129904777. The reversal of 129904766 is 667409921.

It is a semiprime because it is the product of two primes.

It is a Curzon 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 as a sum of consecutive naturals, namely, 32476190 + ... + 32476193.

It is an arithmetic number, because the mean of its divisors is an integer number (48714288).

Almost surely, 2^129904766 is an apocalyptic number.

129904766 is a deficient number, since it is larger than the sum of its proper divisors (64952386).

129904766 is an equidigital number, since it uses as much as digits as its factorization.

129904766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64952385.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 129904766 is about 11397.5771986857. The cubic root of 129904766 is about 506.4559701236.

The spelling of 129904766 in words is "one hundred twenty-nine million, nine hundred four thousand, seven hundred sixty-six".