1223345667889 has 2 divisors, whose sum is σ = 1223345667890. Its totient is φ = 1223345667888.

The previous prime is 1223345667871. The next prime is 1223345667893. The reversal of 1223345667889 is 9887665433221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1092374057889 + 130971610000 = 1045167^2 + 361900^2 .

It is an emirp because it is prime and its reverse (9887665433221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1223345667889 - 2⁹ = 1223345667377 is a prime.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1223345667889.

It is not a weakly prime, because it can be changed into another prime (1223345667289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611672833944 + 611672833945.

It is an arithmetic number, because the mean of its divisors is an integer number (611672833945).

Almost surely, 2^{1223345667889} is an apocalyptic number.

It is an amenable number.

1223345667889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223345667889 is an equidigital number, since it uses as much as digits as its factorization.

1223345667889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104509440, while the sum is 64.

The spelling of 1223345667889 in words is "one trillion, two hundred twenty-three billion, three hundred forty-five million, six hundred sixty-seven thousand, eight hundred eighty-nine".