6844217689 has 2 divisors, whose sum is σ = 6844217690. Its totient is φ = 6844217688.

The previous prime is 6844217669. The next prime is 6844217713. The reversal of 6844217689 is 9867124486.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4283048025 + 2561169664 = 65445^2 + 50608^2 .

It is a cyclic number.

It is not a de Polignac number, because 6844217689 - 2¹³ = 6844209497 is a prime.

It is not a weakly prime, because it can be changed into another prime (6844217669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3422108844 + 3422108845.

It is an arithmetic number, because the mean of its divisors is an integer number (3422108845).

Almost surely, 2^6844217689 is an apocalyptic number.

It is an amenable number.

6844217689 is a deficient number, since it is larger than the sum of its proper divisors (1).

6844217689 is an equidigital number, since it uses as much as digits as its factorization.

6844217689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4644864, while the sum is 55.

The square root of 6844217689 is about 82729.7871930056. The cubic root of 6844217689 is about 1898.6340772671.

The spelling of 6844217689 in words is "six billion, eight hundred forty-four million, two hundred seventeen thousand, six hundred eighty-nine".