123323009 has 2 divisors, whose sum is σ = 123323010. Its totient is φ = 123323008.

The previous prime is 123323003. The next prime is 123323017. The reversal of 123323009 is 900323321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66471409 + 56851600 = 8153^2 + 7540^2 .

It is an emirp because it is prime and its reverse (900323321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123323009 - 2²⁰ = 122274433 is a prime.

It is not a weakly prime, because it can be changed into another prime (123323003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61661504 + 61661505.

It is an arithmetic number, because the mean of its divisors is an integer number (61661505).

Almost surely, 2^123323009 is an apocalyptic number.

It is an amenable number.

123323009 is a deficient number, since it is larger than the sum of its proper divisors (1).

123323009 is an equidigital number, since it uses as much as digits as its factorization.

123323009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 123323009 is about 11105.0893287717. The cubic root of 123323009 is about 497.7539375145.

It can be divided in two parts, 1233 and 23009, that added together give a palindrome (24242).

The spelling of 123323009 in words is "one hundred twenty-three million, three hundred twenty-three thousand, nine".