129972339 has 48 divisors (see below), whose sum is σ = 221644800. Its totient is φ = 71860608.

The previous prime is 129972329. The next prime is 129972341. The reversal of 129972339 is 933279921.

It is a happy number.

It is not a de Polignac number, because 129972339 - 2⁷ = 129972211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129972294 and 129972303.

It is not an unprimeable number, because it can be changed into a prime (129972319) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 271102 + ... + 271580.

It is an arithmetic number, because the mean of its divisors is an integer number (4617600).

Almost surely, 2^129972339 is an apocalyptic number.

129972339 is a deficient number, since it is larger than the sum of its proper divisors (91672461).

129972339 is a wasteful number, since it uses less digits than its factorization.

129972339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624 (or 621 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 129972339 is about 11400.5411713655. The cubic root of 129972339 is about 506.5437698714.

The spelling of 129972339 in words is "one hundred twenty-nine million, nine hundred seventy-two thousand, three hundred thirty-nine".