6981169687 has 2 divisors, whose sum is σ = 6981169688. Its totient is φ = 6981169686.

The previous prime is 6981169633. The next prime is 6981169703. The reversal of 6981169687 is 7869611896.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6981169687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6981169607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3490584843 + 3490584844.

It is an arithmetic number, because the mean of its divisors is an integer number (3490584844).

Almost surely, 2^6981169687 is an apocalyptic number.

6981169687 is a deficient number, since it is larger than the sum of its proper divisors (1).

6981169687 is an equidigital number, since it uses as much as digits as its factorization.

6981169687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 61.

The square root of 6981169687 is about 83553.3942278828. The cubic root of 6981169687 is about 1911.2143522616.

The spelling of 6981169687 in words is "six billion, nine hundred eighty-one million, one hundred sixty-nine thousand, six hundred eighty-seven".