129288080813 has 4 divisors (see below), whose sum is σ = 129301652508. Its totient is φ = 129274509120.

The previous prime is 129288080783. The next prime is 129288080837. The reversal of 129288080813 is 318080882921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 318080882921 = 1759 ⋅180830519.

It can be written as a sum of positive squares in 2 ways, for example, as 20072372329 + 109215708484 = 141677^2 + 330478^2 .

It is a cyclic number.

It is not a de Polignac number, because 129288080813 - 2¹⁴ = 129288064429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129248080813) 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, 6771548 + ... + 6790613.

It is an arithmetic number, because the mean of its divisors is an integer number (32325413127).

Almost surely, 2^129288080813 is an apocalyptic number.

It is an amenable number.

129288080813 is a deficient number, since it is larger than the sum of its proper divisors (13571695).

129288080813 is an equidigital number, since it uses as much as digits as its factorization.

129288080813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13571694.

The product of its (nonzero) digits is 442368, while the sum is 50.

The spelling of 129288080813 in words is "one hundred twenty-nine billion, two hundred eighty-eight million, eighty thousand, eight hundred thirteen".