223644643 has 2 divisors, whose sum is σ = 223644644. Its totient is φ = 223644642.

The previous prime is 223644601. The next prime is 223644653. The reversal of 223644643 is 346446322.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 223644643 - 2⁹ = 223644131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 223644599 and 223644608.

It is not a weakly prime, because it can be changed into another prime (223644653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111822321 + 111822322.

It is an arithmetic number, because the mean of its divisors is an integer number (111822322).

Almost surely, 2^223644643 is an apocalyptic number.

223644643 is a deficient number, since it is larger than the sum of its proper divisors (1).

223644643 is an equidigital number, since it uses as much as digits as its factorization.

223644643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 34.

The square root of 223644643 is about 14954.7531908755. The cubic root of 223644643 is about 606.9964716757.

The spelling of 223644643 in words is "two hundred twenty-three million, six hundred forty-four thousand, six hundred forty-three".