129968993 has 8 divisors (see below), whose sum is σ = 162039360. Its totient is φ = 101274480.

The previous prime is 129968989. The next prime is 129969071. The reversal of 129968993 is 399869921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129968993 - 2² = 129968989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129968903) by changing a digit.

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, 843878 + ... + 844031.

It is an arithmetic number, because the mean of its divisors is an integer number (20254920).

Almost surely, 2^129968993 is an apocalyptic number.

It is an amenable number.

129968993 is a deficient number, since it is larger than the sum of its proper divisors (32070367).

129968993 is a wasteful number, since it uses less digits than its factorization.

129968993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1687927.

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

The square root of 129968993 is about 11400.3944230013. The cubic root of 129968993 is about 506.5394230234.

The spelling of 129968993 in words is "one hundred twenty-nine million, nine hundred sixty-eight thousand, nine hundred ninety-three".