129039382 has 8 divisors (see below), whose sum is σ = 198280152. Its totient is φ = 62946000.

The previous prime is 129039377. The next prime is 129039389. The reversal of 129039382 is 283930921.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129039389) 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, 786744 + ... + 786907.

It is an arithmetic number, because the mean of its divisors is an integer number (24785019).

Almost surely, 2^129039382 is an apocalyptic number.

129039382 is a deficient number, since it is larger than the sum of its proper divisors (69240770).

129039382 is a wasteful number, since it uses less digits than its factorization.

129039382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573694.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 129039382 is about 11359.5502551818. The cubic root of 129039382 is about 505.3288476700.

The spelling of 129039382 in words is "one hundred twenty-nine million, thirty-nine thousand, three hundred eighty-two".