129538087396 has 9 divisors (see below), whose sum is σ = 226692912649. Its totient is φ = 64768683784.

The previous prime is 129538087379. The next prime is 129538087433. The reversal of 129538087396 is 693780835921.

The square root of 129538087396 is 359914.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 24214472100 + 105323615296 = 155610^2 + 324536^2 .

It is a Duffinian number.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 629850 + ... + 809806.

Almost surely, 2^129538087396 is an apocalyptic number.

129538087396 is the 359914-th square number.

It is an amenable number.

129538087396 is a deficient number, since it is larger than the sum of its proper divisors (97154825253).

129538087396 is an frugal number, since it uses more digits than its factorization.

129538087396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359918 (or 179959 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 129538087396 in words is "one hundred twenty-nine billion, five hundred thirty-eight million, eighty-seven thousand, three hundred ninety-six".