1223344567897 has 2 divisors, whose sum is σ = 1223344567898. Its totient is φ = 1223344567896.

The previous prime is 1223344567889. The next prime is 1223344567901. The reversal of 1223344567897 is 7987654433221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 875027414041 + 348317153856 = 935429^2 + 590184^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223344567897 - 2³ = 1223344567889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1223344567997) 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, 611672283948 + 611672283949.

It is an arithmetic number, because the mean of its divisors is an integer number (611672283949).

Almost surely, 2^{1223344567897} is an apocalyptic number.

It is an amenable number.

1223344567897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223344567897 is an equidigital number, since it uses as much as digits as its factorization.

1223344567897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60963840, while the sum is 61.

The spelling of 1223344567897 in words is "one trillion, two hundred twenty-three billion, three hundred forty-four million, five hundred sixty-seven thousand, eight hundred ninety-seven".