6720338839 has 2 divisors, whose sum is σ = 6720338840. Its totient is φ = 6720338838.

The previous prime is 6720338837. The next prime is 6720338857. The reversal of 6720338839 is 9388330276.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6720338839 - 2¹ = 6720338837 is a prime.

It is a super-2 number, since 2×6720338839² = 90325908221943735842, which contains 22 as substring.

Together with 6720338837, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 6720338792 and 6720338801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6720338837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3360169419 + 3360169420.

It is an arithmetic number, because the mean of its divisors is an integer number (3360169420).

Almost surely, 2^6720338839 is an apocalyptic number.

6720338839 is a deficient number, since it is larger than the sum of its proper divisors (1).

6720338839 is an equidigital number, since it uses as much as digits as its factorization.

6720338839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The square root of 6720338839 is about 81977.6728079054. The cubic root of 6720338839 is about 1887.1093086315.

The spelling of 6720338839 in words is "six billion, seven hundred twenty million, three hundred thirty-eight thousand, eight hundred thirty-nine".