223666679 has 2 divisors, whose sum is σ = 223666680. Its totient is φ = 223666678.

The previous prime is 223666669. The next prime is 223666691. The reversal of 223666679 is 976666322.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223666679 is a prime.

It is a Chen prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223666669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111833339 + 111833340.

It is an arithmetic number, because the mean of its divisors is an integer number (111833340).

Almost surely, 2^223666679 is an apocalyptic number.

223666679 is a deficient number, since it is larger than the sum of its proper divisors (1).

223666679 is an equidigital number, since it uses as much as digits as its factorization.

223666679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 47.

The square root of 223666679 is about 14955.4899284510. The cubic root of 223666679 is about 607.0164070738.

The spelling of 223666679 in words is "two hundred twenty-three million, six hundred sixty-six thousand, six hundred seventy-nine".