6863939189 has 2 divisors, whose sum is σ = 6863939190. Its totient is φ = 6863939188.

The previous prime is 6863939149. The next prime is 6863939209. The reversal of 6863939189 is 9819393686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5853780100 + 1010159089 = 76510^2 + 31783^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6863939189 is a prime.

It is a super-2 number, since 2×6863939189² = 94227322380579955442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6863939149) 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, 3431969594 + 3431969595.

It is an arithmetic number, because the mean of its divisors is an integer number (3431969595).

Almost surely, 2^6863939189 is an apocalyptic number.

It is an amenable number.

6863939189 is a deficient number, since it is larger than the sum of its proper divisors (1).

6863939189 is an equidigital number, since it uses as much as digits as its factorization.

6863939189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15116544, while the sum is 62.

The square root of 6863939189 is about 82848.8937101758. The cubic root of 6863939189 is about 1900.4559560386.

The spelling of 6863939189 in words is "six billion, eight hundred sixty-three million, nine hundred thirty-nine thousand, one hundred eighty-nine".