123000013009 has 2 divisors, whose sum is σ = 123000013010. Its totient is φ = 123000013008.

The previous prime is 123000012937. The next prime is 123000013021. The reversal of 123000013009 is 900310000321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122830622784 + 169390225 = 350472^2 + 13015^2 .

It is a cyclic number.

It is not a de Polignac number, because 123000013009 - 2²³ = 122991624401 is a prime.

It is not a weakly prime, because it can be changed into another prime (123000013099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61500006504 + 61500006505.

It is an arithmetic number, because the mean of its divisors is an integer number (61500006505).

Almost surely, 2^123000013009 is an apocalyptic number.

It is an amenable number.

123000013009 is a deficient number, since it is larger than the sum of its proper divisors (1).

123000013009 is an equidigital number, since it uses as much as digits as its factorization.

123000013009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 19.

The spelling of 123000013009 in words is "one hundred twenty-three billion, thirteen thousand, nine".