8129793747 has 6 divisors (see below), whose sum is σ = 10839933228. Its totient is φ = 5419758384.

The previous prime is 8129793719. The next prime is 8129793751. The reversal of 8129793747 is 7473979218.

It is not a de Polignac number, because 8129793747 - 2¹¹ = 8129791699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8129793757) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 130143 + ... + 182199.

It is an arithmetic number, because the mean of its divisors is an integer number (1806655538).

Almost surely, 2^8129793747 is an apocalyptic number.

8129793747 is a deficient number, since it is larger than the sum of its proper divisors (2710139481).

8129793747 is an frugal number, since it uses more digits than its factorization.

8129793747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104117 (or 52060 counting only the distinct ones).

The product of its digits is 5334336, while the sum is 57.

The square root of 8129793747 is about 90165.3688896130. The cubic root of 8129793747 is about 2010.7581726826.

The spelling of 8129793747 in words is "eight billion, one hundred twenty-nine million, seven hundred ninety-three thousand, seven hundred forty-seven".