423384209 has 2 divisors, whose sum is σ = 423384210. Its totient is φ = 423384208.

The previous prime is 423384191. The next prime is 423384257. The reversal of 423384209 is 902483324.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 371140225 + 52243984 = 19265^2 + 7228^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423384209 is a prime.

It is not a weakly prime, because it can be changed into another prime (423084209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211692104 + 211692105.

It is an arithmetic number, because the mean of its divisors is an integer number (211692105).

Almost surely, 2^423384209 is an apocalyptic number.

It is an amenable number.

423384209 is a deficient number, since it is larger than the sum of its proper divisors (1).

423384209 is an equidigital number, since it uses as much as digits as its factorization.

423384209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 423384209 is about 20576.3021216155. The cubic root of 423384209 is about 750.8932817154.

The spelling of 423384209 in words is "four hundred twenty-three million, three hundred eighty-four thousand, two hundred nine".