423444143 has 16 divisors (see below), whose sum is σ = 453600000. Its totient is φ = 393902592.

The previous prime is 423444113. The next prime is 423444149. The reversal of 423444143 is 341444324.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 423444143 - 2⁶ = 423444079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423444149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 883778 + ... + 884256.

It is an arithmetic number, because the mean of its divisors is an integer number (28350000).

Almost surely, 2^423444143 is an apocalyptic number.

423444143 is a deficient number, since it is larger than the sum of its proper divisors (30155857).

423444143 is a wasteful number, since it uses less digits than its factorization.

423444143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994.

The product of its digits is 18432, while the sum is 29.

The square root of 423444143 is about 20577.7584542146. The cubic root of 423444143 is about 750.9287120358.

Adding to 423444143 its reverse (341444324), we get a palindrome (764888467).

The spelling of 423444143 in words is "four hundred twenty-three million, four hundred forty-four thousand, one hundred forty-three".