129392168 has 16 divisors (see below), whose sum is σ = 256881780. Its totient is φ = 60890368.

The previous prime is 129392167. The next prime is 129392173. The reversal of 129392168 is 861293921.

It can be written as a sum of positive squares in 2 ways, for example, as 128097124 + 1295044 = 11318^2 + 1138^2 .

It is not an unprimeable number, because it can be changed into a prime (129392167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475571 + ... + 475842.

Almost surely, 2^129392168 is an apocalyptic number.

It is an amenable number.

129392168 is a deficient number, since it is larger than the sum of its proper divisors (127489612).

129392168 is a wasteful number, since it uses less digits than its factorization.

129392168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951436 (or 951432 counting only the distinct ones).

The product of its digits is 46656, while the sum is 41.

The square root of 129392168 is about 11375.0678239736. The cubic root of 129392168 is about 505.7889416451.

The spelling of 129392168 in words is "one hundred twenty-nine million, three hundred ninety-two thousand, one hundred sixty-eight".