2806138679 has 2 divisors, whose sum is σ = 2806138680. Its totient is φ = 2806138678.

The previous prime is 2806138669. The next prime is 2806138681. The reversal of 2806138679 is 9768316082.

2806138679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2806138679 - 2¹⁶ = 2806073143 is a prime.

Together with 2806138681, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2806138669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1403069339 + 1403069340.

It is an arithmetic number, because the mean of its divisors is an integer number (1403069340).

Almost surely, 2^2806138679 is an apocalyptic number.

2806138679 is a deficient number, since it is larger than the sum of its proper divisors (1).

2806138679 is an equidigital number, since it uses as much as digits as its factorization.

2806138679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 2806138679 is about 52972.9995280615. Note that the first 3 decimals coincide. The cubic root of 2806138679 is about 1410.4890208934.

Adding to 2806138679 its sum of digits (50), we get a square (2806138729 = 52973²).

The spelling of 2806138679 in words is "two billion, eight hundred six million, one hundred thirty-eight thousand, six hundred seventy-nine".