423112012009 has 2 divisors, whose sum is σ = 423112012010. Its totient is φ = 423112012008.

The previous prime is 423112011967. The next prime is 423112012027. The reversal of 423112012009 is 900210211324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 337026691600 + 86085320409 = 580540^2 + 293403^2 .

It is a cyclic number.

It is not a de Polignac number, because 423112012009 - 2²⁵ = 423078457577 is a prime.

It is not a weakly prime, because it can be changed into another prime (423112012409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211556006004 + 211556006005.

It is an arithmetic number, because the mean of its divisors is an integer number (211556006005).

Almost surely, 2^423112012009 is an apocalyptic number.

It is an amenable number.

423112012009 is a deficient number, since it is larger than the sum of its proper divisors (1).

423112012009 is an equidigital number, since it uses as much as digits as its factorization.

423112012009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 423112012009 in words is "four hundred twenty-three billion, one hundred twelve million, twelve thousand, nine".