6689423393 has 2 divisors, whose sum is σ = 6689423394. Its totient is φ = 6689423392.

The previous prime is 6689423353. The next prime is 6689423459. The reversal of 6689423393 is 3933249866.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5658499729 + 1030923664 = 75223^2 + 32108^2 .

It is a cyclic number.

It is not a de Polignac number, because 6689423393 - 2²⁴ = 6672646177 is a prime.

It is not a weakly prime, because it can be changed into another prime (6689423353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3344711696 + 3344711697.

It is an arithmetic number, because the mean of its divisors is an integer number (3344711697).

Almost surely, 2^6689423393 is an apocalyptic number.

It is an amenable number.

6689423393 is a deficient number, since it is larger than the sum of its proper divisors (1).

6689423393 is an equidigital number, since it uses as much as digits as its factorization.

6689423393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 53.

The square root of 6689423393 is about 81788.8952914758. The cubic root of 6689423393 is about 1884.2111156453.

The spelling of 6689423393 in words is "six billion, six hundred eighty-nine million, four hundred twenty-three thousand, three hundred ninety-three".