129992700 has 36 divisors (see below), whose sum is σ = 376113080. Its totient is φ = 34664640.

The previous prime is 129992627. The next prime is 129992701. The reversal of 129992700 is 7299921.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129992701) 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, 216355 + ... + 216954.

Almost surely, 2^129992700 is an apocalyptic number.

129992700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129992700 is an abundant number, since it is smaller than the sum of its proper divisors (246120380).

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

129992700 is a wasteful number, since it uses less digits than its factorization.

129992700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433326 (or 433319 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 129992700 is about 11401.4341203201. The cubic root of 129992700 is about 506.5702195997.

The spelling of 129992700 in words is "one hundred twenty-nine million, nine hundred ninety-two thousand, seven hundred".