423434431 has 6 divisors (see below), whose sum is σ = 492566640. Its totient is φ = 362943756.

The previous prime is 423434413. The next prime is 423434447. The reversal of 423434431 is 134434324.

It is not a de Polignac number, because 423434431 - 2⁷ = 423434303 is a prime.

It is a super-2 number, since 2×423434431² = 358593434712587522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 423434431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423434491) 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 5 ways as a sum of consecutive naturals, for example, 4320711 + ... + 4320808.

It is an arithmetic number, because the mean of its divisors is an integer number (82094440).

Almost surely, 2^423434431 is an apocalyptic number.

423434431 is a deficient number, since it is larger than the sum of its proper divisors (69132209).

423434431 is an equidigital number, since it uses as much as digits as its factorization.

423434431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8641533 (or 8641526 counting only the distinct ones).

The product of its digits is 13824, while the sum is 28.

The square root of 423434431 is about 20577.5224699185. The cubic root of 423434431 is about 750.9229709595.

Adding to 423434431 its reverse (134434324), we get a palindrome (557868755).

The spelling of 423434431 in words is "four hundred twenty-three million, four hundred thirty-four thousand, four hundred thirty-one".