129993908 has 24 divisors (see below), whose sum is σ = 248989440. Its totient is φ = 58893120.

The previous prime is 129993889. The next prime is 129993923. The reversal of 129993908 is 809399921.

It is a super-2 number, since 2×129993908² = 33796832234224928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9053 + ... + 18491.

It is an arithmetic number, because the mean of its divisors is an integer number (10374560).

Almost surely, 2^129993908 is an apocalyptic number.

It is an amenable number.

129993908 is a deficient number, since it is larger than the sum of its proper divisors (118995532).

129993908 is a wasteful number, since it uses less digits than its factorization.

129993908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9767 (or 9765 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 50.

The square root of 129993908 is about 11401.4870959888. The cubic root of 129993908 is about 506.5717887518.

The spelling of 129993908 in words is "one hundred twenty-nine million, nine hundred ninety-three thousand, nine hundred eight".