129671900 has 36 divisors (see below), whose sum is σ = 281914248. Its totient is φ = 51771840.

The previous prime is 129671873. The next prime is 129671921. The reversal of 129671900 is 9176921.

It is a super-2 number, since 2×129671900² = 33629603299220000, which contains 22 as substring.

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, 78887 + ... + 80513.

Almost surely, 2^129671900 is an apocalyptic number.

129671900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129671900 is an abundant number, since it is smaller than the sum of its proper divisors (152242348).

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

129671900 is a wasteful number, since it uses less digits than its factorization.

129671900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2438 (or 2431 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 129671900 is about 11387.3570243494. The cubic root of 129671900 is about 506.1531664612.

The spelling of 129671900 in words is "one hundred twenty-nine million, six hundred seventy-one thousand, nine hundred".