129568910 has 16 divisors (see below), whose sum is σ = 234792000. Its totient is φ = 51479136.

The previous prime is 129568903. The next prime is 129568919. The reversal of 129568910 is 19865921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129568919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41990 + ... + 44969.

It is an arithmetic number, because the mean of its divisors is an integer number (14674500).

Almost surely, 2^129568910 is an apocalyptic number.

129568910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129568910 is a deficient number, since it is larger than the sum of its proper divisors (105223090).

129568910 is a wasteful number, since it uses less digits than its factorization.

129568910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87115.

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 129568910 is about 11382.8340056420. The cubic root of 129568910 is about 506.0191293991.

The spelling of 129568910 in words is "one hundred twenty-nine million, five hundred sixty-eight thousand, nine hundred ten".