423430009 has 2 divisors, whose sum is σ = 423430010. Its totient is φ = 423430008.

The previous prime is 423429997. The next prime is 423430019. The reversal of 423430009 is 900034324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 361760400 + 61669609 = 19020^2 + 7853^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423430009 is a prime.

It is not a weakly prime, because it can be changed into another prime (423430019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211715004 + 211715005.

It is an arithmetic number, because the mean of its divisors is an integer number (211715005).

Almost surely, 2^423430009 is an apocalyptic number.

It is an amenable number.

423430009 is a deficient number, since it is larger than the sum of its proper divisors (1).

423430009 is an equidigital number, since it uses as much as digits as its factorization.

423430009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 423430009 is about 20577.4150223005. The cubic root of 423430009 is about 750.9203569436.

It can be divided in two parts, 4234 and 30009, that added together give a palindrome (34243).

The spelling of 423430009 in words is "four hundred twenty-three million, four hundred thirty thousand, nine".