129923958 has 8 divisors (see below), whose sum is σ = 259847928. Its totient is φ = 43307984.

The previous prime is 129923951. The next prime is 129923971. The reversal of 129923958 is 859329921.

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

129923958 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129923951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10826991 + ... + 10827002.

It is an arithmetic number, because the mean of its divisors is an integer number (32480991).

Almost surely, 2^129923958 is an apocalyptic number.

129923958 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

129923958 is a wasteful number, since it uses less digits than its factorization.

129923958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21653998.

The product of its digits is 349920, while the sum is 48.

The square root of 129923958 is about 11398.4191009104. The cubic root of 129923958 is about 506.4809099947.

The spelling of 129923958 in words is "one hundred twenty-nine million, nine hundred twenty-three thousand, nine hundred fifty-eight".