6893883181721 has 2 divisors, whose sum is σ = 6893883181722. Its totient is φ = 6893883181720.

The previous prime is 6893883181709. The next prime is 6893883181723. The reversal of 6893883181721 is 1271813883986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5465009605696 + 1428873576025 = 2337736^2 + 1195355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6893883181721 is a prime.

Together with 6893883181723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6893883181723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3446941590860 + 3446941590861.

It is an arithmetic number, because the mean of its divisors is an integer number (3446941590861).

Almost surely, 2^{6893883181721} is an apocalyptic number.

It is an amenable number.

6893883181721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6893883181721 is an equidigital number, since it uses as much as digits as its factorization.

6893883181721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27869184, while the sum is 65.

The spelling of 6893883181721 in words is "six trillion, eight hundred ninety-three billion, eight hundred eighty-three million, one hundred eighty-one thousand, seven hundred twenty-one".