8129739507 has 16 divisors (see below), whose sum is σ = 11721480192. Its totient is φ = 4992479360.

The previous prime is 8129739503. The next prime is 8129739517. The reversal of 8129739507 is 7059379218.

It is a cyclic number.

It is not a de Polignac number, because 8129739507 - 2² = 8129739503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 8129739507.

It is not an unprimeable number, because it can be changed into a prime (8129739503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1693419 + ... + 1698212.

It is an arithmetic number, because the mean of its divisors is an integer number (732592512).

Almost surely, 2^8129739507 is an apocalyptic number.

8129739507 is a deficient number, since it is larger than the sum of its proper divisors (3591740685).

8129739507 is a wasteful number, since it uses less digits than its factorization.

8129739507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3391698.

The product of its (nonzero) digits is 952560, while the sum is 51.

The square root of 8129739507 is about 90165.0681084421. The cubic root of 8129739507 is about 2010.7537009100.

The spelling of 8129739507 in words is "eight billion, one hundred twenty-nine million, seven hundred thirty-nine thousand, five hundred seven".