129993724 has 24 divisors (see below), whose sum is σ = 261231488. Its totient is φ = 55445040.

The previous prime is 129993719. The next prime is 129993733. The reversal of 129993724 is 427399921.

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 7 ways as a sum of consecutive naturals, for example, 5094 + ... + 16909.

Almost surely, 2^129993724 is an apocalyptic number.

129993724 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

129993724 is an abundant number, since it is smaller than the sum of its proper divisors (131237764).

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

129993724 is a wasteful number, since it uses less digits than its factorization.

129993724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22225 (or 22223 counting only the distinct ones).

The product of its digits is 244944, while the sum is 46.

The square root of 129993724 is about 11401.4790268631. The cubic root of 129993724 is about 506.5715497425.

The spelling of 129993724 in words is "one hundred twenty-nine million, nine hundred ninety-three thousand, seven hundred twenty-four".