6728447413 has 2 divisors, whose sum is σ = 6728447414. Its totient is φ = 6728447412.

The previous prime is 6728447339. The next prime is 6728447423. The reversal of 6728447413 is 3147448276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6672765969 + 55681444 = 81687^2 + 7462^2 .

It is a cyclic number.

It is not a de Polignac number, because 6728447413 - 2²¹ = 6726350261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6728447423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3364223706 + 3364223707.

It is an arithmetic number, because the mean of its divisors is an integer number (3364223707).

Almost surely, 2^6728447413 is an apocalyptic number.

It is an amenable number.

6728447413 is a deficient number, since it is larger than the sum of its proper divisors (1).

6728447413 is an equidigital number, since it uses as much as digits as its factorization.

6728447413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 46.

The square root of 6728447413 is about 82027.1138892501. The cubic root of 6728447413 is about 1887.8679814571.

The spelling of 6728447413 in words is "six billion, seven hundred twenty-eight million, four hundred forty-seven thousand, four hundred thirteen".