129831907 has 8 divisors (see below), whose sum is σ = 140394816. Its totient is φ = 119594112.

The previous prime is 129831899. The next prime is 129831913. The reversal of 129831907 is 709138921.

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 129831907 - 2³ = 129831899 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129831907.

It is not an unprimeable number, because it can be changed into a prime (129831917) 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, 80448 + ... + 82045.

It is an arithmetic number, because the mean of its divisors is an integer number (17549352).

Almost surely, 2^129831907 is an apocalyptic number.

129831907 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

129831907 is a deficient number, since it is larger than the sum of its proper divisors (10562909).

129831907 is a wasteful number, since it uses less digits than its factorization.

129831907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162557.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 129831907 is about 11394.3805009311. The cubic root of 129831907 is about 506.3612679880.

The spelling of 129831907 in words is "one hundred twenty-nine million, eight hundred thirty-one thousand, nine hundred seven".