223423999 has 2 divisors, whose sum is σ = 223424000. Its totient is φ = 223423998.

The previous prime is 223423997. The next prime is 223424011. The reversal of 223423999 is 999324322.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 223423999 - 2¹ = 223423997 is a prime.

Together with 223423997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223423997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111711999 + 111712000.

It is an arithmetic number, because the mean of its divisors is an integer number (111712000).

Almost surely, 2^223423999 is an apocalyptic number.

223423999 is a deficient number, since it is larger than the sum of its proper divisors (1).

223423999 is an equidigital number, since it uses as much as digits as its factorization.

223423999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 43.

The square root of 223423999 is about 14947.3743179195. The cubic root of 223423999 is about 606.7967885292.

It can be divided in two parts, 223423 and 999, that added together give a palindrome (224422).

The spelling of 223423999 in words is "two hundred twenty-three million, four hundred twenty-three thousand, nine hundred ninety-nine".