423430443 has 8 divisors (see below), whose sum is σ = 627304400. Its totient is φ = 282286944.

The previous prime is 423430387. The next prime is 423430459. The reversal of 423430443 is 344034324.

It is not a de Polignac number, because 423430443 - 2⁸ = 423430187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 15682609 = 423430443 / (4 + 2 + 3 + 4 + 3 + 0 + 4 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423438443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7841278 + ... + 7841331.

It is an arithmetic number, because the mean of its divisors is an integer number (78413050).

Almost surely, 2^423430443 is an apocalyptic number.

423430443 is a deficient number, since it is larger than the sum of its proper divisors (203873957).

423430443 is a wasteful number, since it uses less digits than its factorization.

423430443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15682618 (or 15682612 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

The square root of 423430443 is about 20577.4255678401. The cubic root of 423430443 is about 750.9206134987.

Adding to 423430443 its reverse (344034324), we get a palindrome (767464767).

The spelling of 423430443 in words is "four hundred twenty-three million, four hundred thirty thousand, four hundred forty-three".