129993896 has 32 divisors (see below), whose sum is σ = 257174400. Its totient is φ = 61430400.

The previous prime is 129993889. The next prime is 129993923. The reversal of 129993896 is 698399921.

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, 90641 + ... + 92063.

It is an arithmetic number, because the mean of its divisors is an integer number (8036700).

Almost surely, 2^129993896 is an apocalyptic number.

It is an amenable number.

129993896 is a deficient number, since it is larger than the sum of its proper divisors (127180504).

129993896 is a wasteful number, since it uses less digits than its factorization.

129993896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049 (or 2045 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 56.

The square root of 129993896 is about 11401.4865697417. The cubic root of 129993896 is about 506.5717731642.

The spelling of 129993896 in words is "one hundred twenty-nine million, nine hundred ninety-three thousand, eight hundred ninety-six".