129003900 has 36 divisors (see below), whose sum is σ = 373252152. Its totient is φ = 34400960.

The previous prime is 129003869. The next prime is 129003911. The reversal of 129003900 is 9300921.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214707 + ... + 215306.

Almost surely, 2^129003900 is an apocalyptic number.

129003900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129003900 is an abundant number, since it is smaller than the sum of its proper divisors (244248252).

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

129003900 is a wasteful number, since it uses less digits than its factorization.

129003900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430030 (or 430023 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 129003900 is about 11357.9883782297. The cubic root of 129003900 is about 505.2825266127.

The spelling of 129003900 in words is "one hundred twenty-nine million, three thousand, nine hundred".