6713320421 has 2 divisors, whose sum is σ = 6713320422. Its totient is φ = 6713320420.

The previous prime is 6713320387. The next prime is 6713320429. The reversal of 6713320421 is 1240233176.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5262777025 + 1450543396 = 72545^2 + 38086^2 .

It is a cyclic number.

It is not a de Polignac number, because 6713320421 - 2³⁰ = 5639578597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6713320429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3356660210 + 3356660211.

It is an arithmetic number, because the mean of its divisors is an integer number (3356660211).

Almost surely, 2^6713320421 is an apocalyptic number.

It is an amenable number.

6713320421 is a deficient number, since it is larger than the sum of its proper divisors (1).

6713320421 is an equidigital number, since it uses as much as digits as its factorization.

6713320421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 6713320421 is about 81934.8547383835. The cubic root of 6713320421 is about 1886.4521425969.

Adding to 6713320421 its reverse (1240233176), we get a palindrome (7953553597).

The spelling of 6713320421 in words is "six billion, seven hundred thirteen million, three hundred twenty thousand, four hundred twenty-one".