6938668393 has 2 divisors, whose sum is σ = 6938668394. Its totient is φ = 6938668392.

The previous prime is 6938668381. The next prime is 6938668409. The reversal of 6938668393 is 3938668396.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5274681129 + 1663987264 = 72627^2 + 40792^2 .

It is a cyclic number.

It is not a de Polignac number, because 6938668393 - 2¹⁷ = 6938537321 is a prime.

It is not a weakly prime, because it can be changed into another prime (6938668193) 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, 3469334196 + 3469334197.

It is an arithmetic number, because the mean of its divisors is an integer number (3469334197).

Almost surely, 2^6938668393 is an apocalyptic number.

It is an amenable number.

6938668393 is a deficient number, since it is larger than the sum of its proper divisors (1).

6938668393 is an equidigital number, since it uses as much as digits as its factorization.

6938668393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30233088, while the sum is 61.

The square root of 6938668393 is about 83298.6698153098. The cubic root of 6938668393 is about 1907.3279699333.

The spelling of 6938668393 in words is "six billion, nine hundred thirty-eight million, six hundred sixty-eight thousand, three hundred ninety-three".