128223793169 has 2 divisors, whose sum is σ = 128223793170. Its totient is φ = 128223793168.

The previous prime is 128223793133. The next prime is 128223793177. The reversal of 128223793169 is 961397322821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73625395600 + 54598397569 = 271340^2 + 233663^2 .

It is a cyclic number.

It is not a de Polignac number, because 128223793169 - 2²⁰ = 128222744593 is a prime.

It is a super-2 number, since 2×128223793169² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128223793169.

It is not a weakly prime, because it can be changed into another prime (128223793199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64111896584 + 64111896585.

It is an arithmetic number, because the mean of its divisors is an integer number (64111896585).

Almost surely, 2^128223793169 is an apocalyptic number.

It is an amenable number.

128223793169 is a deficient number, since it is larger than the sum of its proper divisors (1).

128223793169 is an equidigital number, since it uses as much as digits as its factorization.

128223793169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The spelling of 128223793169 in words is "one hundred twenty-eight billion, two hundred twenty-three million, seven hundred ninety-three thousand, one hundred sixty-nine".