844668042697 has 2 divisors, whose sum is σ = 844668042698. Its totient is φ = 844668042696.

The previous prime is 844668042577. The next prime is 844668042721. The reversal of 844668042697 is 796240866448.

844668042697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 839341816336 + 5326226361 = 916156^2 + 72981^2 .

It is a cyclic number.

It is not a de Polignac number, because 844668042697 - 2²⁷ = 844533824969 is a prime.

It is not a weakly prime, because it can be changed into another prime (844668042797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422334021348 + 422334021349.

It is an arithmetic number, because the mean of its divisors is an integer number (422334021349).

Almost surely, 2^844668042697 is an apocalyptic number.

It is an amenable number.

844668042697 is a deficient number, since it is larger than the sum of its proper divisors (1).

844668042697 is an equidigital number, since it uses as much as digits as its factorization.

844668042697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 111476736, while the sum is 64.

The spelling of 844668042697 in words is "eight hundred forty-four billion, six hundred sixty-eight million, forty-two thousand, six hundred ninety-seven".