129839671 has 8 divisors (see below), whose sum is σ = 139973120. Its totient is φ = 119727072.

The previous prime is 129839663. The next prime is 129839683. The reversal of 129839671 is 176938921.

It is a happy number.

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 129839671 - 2³ = 129839663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129839621) 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, 9226 + ... + 18568.

It is an arithmetic number, because the mean of its divisors is an integer number (17496640).

Almost surely, 2^129839671 is an apocalyptic number.

129839671 is a deficient number, since it is larger than the sum of its proper divisors (10133449).

129839671 is a wasteful number, since it uses less digits than its factorization.

129839671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10425.

The product of its digits is 163296, while the sum is 46.

The square root of 129839671 is about 11394.7211900950. The cubic root of 129839671 is about 506.3713613223.

The spelling of 129839671 in words is "one hundred twenty-nine million, eight hundred thirty-nine thousand, six hundred seventy-one".