423389569 has 2 divisors, whose sum is σ = 423389570. Its totient is φ = 423389568.

The previous prime is 423389563. The next prime is 423389579. The reversal of 423389569 is 965983324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 280897600 + 142491969 = 16760^2 + 11937^2 .

It is a cyclic number.

It is not a de Polignac number, because 423389569 - 2⁷ = 423389441 is a prime.

It is a super-2 number, since 2×423389569² = 358517454276011522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (423389563) 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, 211694784 + 211694785.

It is an arithmetic number, because the mean of its divisors is an integer number (211694785).

Almost surely, 2^423389569 is an apocalyptic number.

It is an amenable number.

423389569 is a deficient number, since it is larger than the sum of its proper divisors (1).

423389569 is an equidigital number, since it uses as much as digits as its factorization.

423389569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 49.

The square root of 423389569 is about 20576.4323681245. The cubic root of 423389569 is about 750.8964504456.

The spelling of 423389569 in words is "four hundred twenty-three million, three hundred eighty-nine thousand, five hundred sixty-nine".