423335509 has 2 divisors, whose sum is σ = 423335510. Its totient is φ = 423335508.

The previous prime is 423335503. The next prime is 423335621. The reversal of 423335509 is 905533324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 355322500 + 68013009 = 18850^2 + 8247^2 .

It is a cyclic number.

It is not a de Polignac number, because 423335509 - 2¹¹ = 423333461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423335503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211667754 + 211667755.

It is an arithmetic number, because the mean of its divisors is an integer number (211667755).

Almost surely, 2^423335509 is an apocalyptic number.

It is an amenable number.

423335509 is a deficient number, since it is larger than the sum of its proper divisors (1).

423335509 is an equidigital number, since it uses as much as digits as its factorization.

423335509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 34.

The square root of 423335509 is about 20575.1186873855. The cubic root of 423335509 is about 750.8644899747.

The spelling of 423335509 in words is "four hundred twenty-three million, three hundred thirty-five thousand, five hundred nine".