643300223 has 2 divisors, whose sum is σ = 643300224. Its totient is φ = 643300222.

The previous prime is 643300211. The next prime is 643300237. The reversal of 643300223 is 322003346.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 643300223 - 2¹² = 643296127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (643300283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321650111 + 321650112.

It is an arithmetic number, because the mean of its divisors is an integer number (321650112).

Almost surely, 2^643300223 is an apocalyptic number.

643300223 is a deficient number, since it is larger than the sum of its proper divisors (1).

643300223 is an equidigital number, since it uses as much as digits as its factorization.

643300223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 643300223 is about 25363.3637950490. The cubic root of 643300223 is about 863.2526111110.

Adding to 643300223 its reverse (322003346), we get a palindrome (965303569).

The spelling of 643300223 in words is "six hundred forty-three million, three hundred thousand, two hundred twenty-three".