6348278213 has 2 divisors, whose sum is σ = 6348278214. Its totient is φ = 6348278212.

The previous prime is 6348278197. The next prime is 6348278243. The reversal of 6348278213 is 3128728436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4924951684 + 1423326529 = 70178^2 + 37727^2 .

It is a cyclic number.

It is not a de Polignac number, because 6348278213 - 2⁴ = 6348278197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6348278243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3174139106 + 3174139107.

It is an arithmetic number, because the mean of its divisors is an integer number (3174139107).

Almost surely, 2^6348278213 is an apocalyptic number.

It is an amenable number.

6348278213 is a deficient number, since it is larger than the sum of its proper divisors (1).

6348278213 is an equidigital number, since it uses as much as digits as its factorization.

6348278213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 44.

The square root of 6348278213 is about 79676.0830676308. The cubic root of 6348278213 is about 1851.6205146402.

The spelling of 6348278213 in words is "six billion, three hundred forty-eight million, two hundred seventy-eight thousand, two hundred thirteen".