129087613358929 has 9 divisors (see below), whose sum is σ = 129551838822289. Its totient is φ = 128625045566080.

The previous prime is 129087613358897. The next prime is 129087613358971. The reversal of 129087613358929 is 929853316780921.

The square root of 129087613358929 is 11361673.

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

It can be written as a sum of positive squares in 4 ways, for example, as 5956455142225 + 123131158216704 = 2440585^2 + 11096448^2 .

It is not a de Polignac number, because 129087613358929 - 2⁵ = 129087613358897 is a prime.

It is a super-2 number, since 2×129087613358929² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129087613358999) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3192609897 + ... + 3192650329.

Almost surely, 2^{129087613358929} is an apocalyptic number.

129087613358929 is the 11361673-rd square number.

129087613358929 is the 5680837-th centered octagonal number.

It is an amenable number.

129087613358929 is a deficient number, since it is larger than the sum of its proper divisors (464225463360).

129087613358929 is an frugal number, since it uses more digits than its factorization.

129087613358929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81428 (or 40714 counting only the distinct ones).

The product of its (nonzero) digits is 352719360, while the sum is 73.

The spelling of 129087613358929 in words is "one hundred twenty-nine trillion, eighty-seven billion, six hundred thirteen million, three hundred fifty-eight thousand, nine hundred twenty-nine".