6823720791 has 6 divisors (see below), whose sum is σ = 9856485600. Its totient is φ = 4549147188.

The previous prime is 6823720747. The next prime is 6823720807. The reversal of 6823720791 is 1970273286.

6823720791 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6823720791 - 2⁷ = 6823720663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6823720711) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 379095591 + ... + 379095608.

It is an arithmetic number, because the mean of its divisors is an integer number (1642747600).

Almost surely, 2^6823720791 is an apocalyptic number.

6823720791 is a deficient number, since it is larger than the sum of its proper divisors (3032764809).

6823720791 is a wasteful number, since it uses less digits than its factorization.

6823720791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758191205 (or 758191202 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 6823720791 is about 82605.8157214127. The cubic root of 6823720791 is about 1896.7368542439.

The spelling of 6823720791 in words is "six billion, eight hundred twenty-three million, seven hundred twenty thousand, seven hundred ninety-one".