8126978939 has 8 divisors (see below), whose sum is σ = 8166000960. Its totient is φ = 8087988096.

The previous prime is 8126978921. The next prime is 8126978983. The reversal of 8126978939 is 9398796218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8126978939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8126978989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 642494 + ... + 655020.

It is an arithmetic number, because the mean of its divisors is an integer number (1020750120).

Almost surely, 2^8126978939 is an apocalyptic number.

8126978939 is a deficient number, since it is larger than the sum of its proper divisors (39022021).

8126978939 is a wasteful number, since it uses less digits than its factorization.

8126978939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15589.

The product of its digits is 11757312, while the sum is 62.

The square root of 8126978939 is about 90149.7583967922. The cubic root of 8126978939 is about 2010.5260818609.

The spelling of 8126978939 in words is "eight billion, one hundred twenty-six million, nine hundred seventy-eight thousand, nine hundred thirty-nine".