423089309 has 2 divisors, whose sum is σ = 423089310. Its totient is φ = 423089308.

The previous prime is 423089297. The next prime is 423089371. The reversal of 423089309 is 903980324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 352613284 + 70476025 = 18778^2 + 8395^2 .

It is a cyclic number.

It is not a de Polignac number, because 423089309 - 2²⁰ = 422040733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423089399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211544654 + 211544655.

It is an arithmetic number, because the mean of its divisors is an integer number (211544655).

Almost surely, 2^423089309 is an apocalyptic number.

It is an amenable number.

423089309 is a deficient number, since it is larger than the sum of its proper divisors (1).

423089309 is an equidigital number, since it uses as much as digits as its factorization.

423089309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 423089309 is about 20569.1348627014. The cubic root of 423089309 is about 750.7189012064.

It can be divided in two parts, 4230 and 89309, that added together give a palindrome (93539).

The spelling of 423089309 in words is "four hundred twenty-three million, eighty-nine thousand, three hundred nine".