6921171963 has 6 divisors (see below), whose sum is σ = 9997248404. Its totient is φ = 4614114636.

The previous prime is 6921171889. The next prime is 6921171977. The reversal of 6921171963 is 3691711296.

6921171963 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6921171963 - 2¹⁸ = 6920909819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6921161963) 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 in 5 ways as a sum of consecutive naturals, for example, 384509545 + ... + 384509562.

Almost surely, 2^6921171963 is an apocalyptic number.

6921171963 is a deficient number, since it is larger than the sum of its proper divisors (3076076441).

6921171963 is a wasteful number, since it uses less digits than its factorization.

6921171963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769019113 (or 769019110 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 6921171963 is about 83193.5812608160. The cubic root of 6921171963 is about 1905.7234584528.

The spelling of 6921171963 in words is "six billion, nine hundred twenty-one million, one hundred seventy-one thousand, nine hundred sixty-three".