129839396 has 12 divisors (see below), whose sum is σ = 227937948. Its totient is φ = 64714272.

The previous prime is 129839371. The next prime is 129839417. The reversal of 129839396 is 693938921.

It can be written as a sum of positive squares in 2 ways, for example, as 34386496 + 95452900 = 5864^2 + 9770^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49931 + ... + 52466.

It is an arithmetic number, because the mean of its divisors is an integer number (18994829).

Almost surely, 2^129839396 is an apocalyptic number.

It is an amenable number.

129839396 is a deficient number, since it is larger than the sum of its proper divisors (98098552).

129839396 is a wasteful number, since it uses less digits than its factorization.

129839396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102718 (or 102716 counting only the distinct ones).

The product of its digits is 629856, while the sum is 50.

The square root of 129839396 is about 11394.7091230974. The cubic root of 129839396 is about 506.3710038244.

The spelling of 129839396 in words is "one hundred twenty-nine million, eight hundred thirty-nine thousand, three hundred ninety-six".