129664600 has 48 divisors (see below), whose sum is σ = 324666720. Its totient is φ = 47875200.

The previous prime is 129664583. The next prime is 129664603. The reversal of 129664600 is 6466921.

129664600 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129664603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22336 + ... + 27535.

It is an arithmetic number, because the mean of its divisors is an integer number (6763890).

Almost surely, 2^129664600 is an apocalyptic number.

129664600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129664600 is an abundant number, since it is smaller than the sum of its proper divisors (195002120).

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

129664600 is a wasteful number, since it uses less digits than its factorization.

129664600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49900 (or 49891 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 129664600 is about 11387.0364889202. The cubic root of 129664600 is about 506.1436681622.

The spelling of 129664600 in words is "one hundred twenty-nine million, six hundred sixty-four thousand, six hundred".