6809779 has 2 divisors, whose sum is σ = 6809780. Its totient is φ = 6809778.

The previous prime is 6809767. The next prime is 6809797. The reversal of 6809779 is 9779086.

6809779 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (6809797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6809779 - 2¹⁵ = 6777011 is a prime.

6809779 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6809279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3404889 + 3404890.

It is an arithmetic number, because the mean of its divisors is an integer number (3404890).

Almost surely, 2^6809779 is an apocalyptic number.

6809779 is a deficient number, since it is larger than the sum of its proper divisors (1).

6809779 is an equidigital number, since it uses as much as digits as its factorization.

6809779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 6809779 is about 2609.5553261044. Note that the first 3 decimals coincide. The cubic root of 6809779 is about 189.5444209581.

The spelling of 6809779 in words is "six million, eight hundred nine thousand, seven hundred seventy-nine".