123203023309 has 2 divisors, whose sum is σ = 123203023310. Its totient is φ = 123203023308.

The previous prime is 123203023303. The next prime is 123203023313. The reversal of 123203023309 is 903320302321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87144811209 + 36058212100 = 295203^2 + 189890^2 .

It is a cyclic number.

It is not a de Polignac number, because 123203023309 - 2⁹ = 123203022797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123203023303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61601511654 + 61601511655.

It is an arithmetic number, because the mean of its divisors is an integer number (61601511655).

Almost surely, 2^123203023309 is an apocalyptic number.

It is an amenable number.

123203023309 is a deficient number, since it is larger than the sum of its proper divisors (1).

123203023309 is an equidigital number, since it uses as much as digits as its factorization.

123203023309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 28.

The spelling of 123203023309 in words is "one hundred twenty-three billion, two hundred three million, twenty-three thousand, three hundred nine".