1223489394577 has 2 divisors, whose sum is σ = 1223489394578. Its totient is φ = 1223489394576.

The previous prime is 1223489394553. The next prime is 1223489394581. The reversal of 1223489394577 is 7754939843221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1194913520641 + 28575873936 = 1093121^2 + 169044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223489394577 is a prime.

It is not a weakly prime, because it can be changed into another prime (1223489394527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611744697288 + 611744697289.

It is an arithmetic number, because the mean of its divisors is an integer number (611744697289).

Almost surely, 2^{1223489394577} is an apocalyptic number.

It is an amenable number.

1223489394577 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223489394577 is an equidigital number, since it uses as much as digits as its factorization.

1223489394577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91445760, while the sum is 64.

The spelling of 1223489394577 in words is "one trillion, two hundred twenty-three billion, four hundred eighty-nine million, three hundred ninety-four thousand, five hundred seventy-seven".