129617768 has 16 divisors (see below), whose sum is σ = 277752480. Its totient is φ = 55550448.

The previous prime is 129617737. The next prime is 129617779. The reversal of 129617768 is 867716921.

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, 1157246 + ... + 1157357.

It is an arithmetic number, because the mean of its divisors is an integer number (17359530).

Almost surely, 2^129617768 is an apocalyptic number.

It is an amenable number.

129617768 is an abundant number, since it is smaller than the sum of its proper divisors (148134712).

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

129617768 is a wasteful number, since it uses less digits than its factorization.

129617768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314616 (or 2314612 counting only the distinct ones).

The product of its digits is 254016, while the sum is 47.

The square root of 129617768 is about 11384.9799297144. The cubic root of 129617768 is about 506.0827248397.

The spelling of 129617768 in words is "one hundred twenty-nine million, six hundred seventeen thousand, seven hundred sixty-eight".