6879707138 has 4 divisors (see below), whose sum is σ = 10319560710. Its totient is φ = 3439853568.

The previous prime is 6879707137. The next prime is 6879707161. The reversal of 6879707138 is 8317079786.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6538824769 + 340882369 = 80863^2 + 18463^2 .

It is not an unprimeable number, because it can be changed into a prime (6879707137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1719926783 + ... + 1719926786.

Almost surely, 2^6879707138 is an apocalyptic number.

6879707138 is a deficient number, since it is larger than the sum of its proper divisors (3439853572).

6879707138 is a wasteful number, since it uses less digits than its factorization.

6879707138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3439853571.

The product of its (nonzero) digits is 3556224, while the sum is 56.

The square root of 6879707138 is about 82944.0000120563. Note that the first 4 decimals coincide. The cubic root of 6879707138 is about 1901.9100955476.

The spelling of 6879707138 in words is "six billion, eight hundred seventy-nine million, seven hundred seven thousand, one hundred thirty-eight".