6813333421 has 2 divisors, whose sum is σ = 6813333422. Its totient is φ = 6813333420.

The previous prime is 6813333353. The next prime is 6813333437. The reversal of 6813333421 is 1243333186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6195264100 + 618069321 = 78710^2 + 24861^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6813333421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6813313421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3406666710 + 3406666711.

It is an arithmetic number, because the mean of its divisors is an integer number (3406666711).

Almost surely, 2^6813333421 is an apocalyptic number.

It is an amenable number.

6813333421 is a deficient number, since it is larger than the sum of its proper divisors (1).

6813333421 is an equidigital number, since it uses as much as digits as its factorization.

6813333421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 34.

The square root of 6813333421 is about 82542.9186605368. The cubic root of 6813333421 is about 1895.7739331971.

The spelling of 6813333421 in words is "six billion, eight hundred thirteen million, three hundred thirty-three thousand, four hundred twenty-one".