423444443 has 2 divisors, whose sum is σ = 423444444. Its totient is φ = 423444442.

The previous prime is 423444409. The next prime is 423444451. The reversal of 423444443 is 344444324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 423444443 - 2⁶ = 423444379 is a prime.

It is not a weakly prime, because it can be changed into another prime (423414443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211722221 + 211722222.

It is an arithmetic number, because the mean of its divisors is an integer number (211722222).

Almost surely, 2^423444443 is an apocalyptic number.

423444443 is a deficient number, since it is larger than the sum of its proper divisors (1).

423444443 is an equidigital number, since it uses as much as digits as its factorization.

423444443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73728, while the sum is 32.

The square root of 423444443 is about 20577.7657436370. The cubic root of 423444443 is about 750.9288893741.

Adding to 423444443 its reverse (344444324), we get a palindrome (767888767).

The spelling of 423444443 in words is "four hundred twenty-three million, four hundred forty-four thousand, four hundred forty-three".