123345044609 has 2 divisors, whose sum is σ = 123345044610. Its totient is φ = 123345044608.

The previous prime is 123345044567. The next prime is 123345044623. The reversal of 123345044609 is 906440543321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121711672384 + 1633372225 = 348872^2 + 40415^2 .

It is an emirp because it is prime and its reverse (906440543321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123345044609 - 2⁸ = 123345044353 is a prime.

It is not a weakly prime, because it can be changed into another prime (123345044309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61672522304 + 61672522305.

It is an arithmetic number, because the mean of its divisors is an integer number (61672522305).

Almost surely, 2^123345044609 is an apocalyptic number.

It is an amenable number.

123345044609 is a deficient number, since it is larger than the sum of its proper divisors (1).

123345044609 is an equidigital number, since it uses as much as digits as its factorization.

123345044609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 123345044609 in words is "one hundred twenty-three billion, three hundred forty-five million, forty-four thousand, six hundred nine".