423544689 has 12 divisors (see below), whose sum is σ = 611992576. Its totient is φ = 282268152.

The previous prime is 423544673. The next prime is 423544697. The reversal of 423544689 is 986445324.

423544689 is a `hidden beast` number, since 4 + 23 + 544 + 6 + 89 = 666.

It is not a de Polignac number, because 423544689 - 2⁴ = 423544673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423544699) 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 in 11 ways as a sum of consecutive naturals, for example, 29772 + ... + 41634.

Almost surely, 2^423544689 is an apocalyptic number.

It is an amenable number.

423544689 is a deficient number, since it is larger than the sum of its proper divisors (188447887).

423544689 is a wasteful number, since it uses less digits than its factorization.

423544689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15836 (or 15833 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 423544689 is about 20580.2013838543. The cubic root of 423544689 is about 750.9881428598.

The spelling of 423544689 in words is "four hundred twenty-three million, five hundred forty-four thousand, six hundred eighty-nine".