6931388063 has 2 divisors, whose sum is σ = 6931388064. Its totient is φ = 6931388062.

The previous prime is 6931388047. The next prime is 6931388069. The reversal of 6931388063 is 3608831396.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6931388063 - 2⁴ = 6931388047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6931387999 and 6931388017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6931388069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3465694031 + 3465694032.

It is an arithmetic number, because the mean of its divisors is an integer number (3465694032).

Almost surely, 2^6931388063 is an apocalyptic number.

6931388063 is a deficient number, since it is larger than the sum of its proper divisors (1).

6931388063 is an equidigital number, since it uses as much as digits as its factorization.

6931388063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 6931388063 is about 83254.9581886869. The cubic root of 6931388063 is about 1906.6606547434.

The spelling of 6931388063 in words is "six billion, nine hundred thirty-one million, three hundred eighty-eight thousand, sixty-three".