223320989 has 2 divisors, whose sum is σ = 223320990. Its totient is φ = 223320988.

The previous prime is 223320949. The next prime is 223321009. The reversal of 223320989 is 989023322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188156089 + 35164900 = 13717^2 + 5930^2 .

It is a cyclic number.

It is not a de Polignac number, because 223320989 - 2⁸ = 223320733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223320949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111660494 + 111660495.

It is an arithmetic number, because the mean of its divisors is an integer number (111660495).

Almost surely, 2^223320989 is an apocalyptic number.

It is an amenable number.

223320989 is a deficient number, since it is larger than the sum of its proper divisors (1).

223320989 is an equidigital number, since it uses as much as digits as its factorization.

223320989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 223320989 is about 14943.9281649772. The cubic root of 223320989 is about 606.7035193100.

The spelling of 223320989 in words is "two hundred twenty-three million, three hundred twenty thousand, nine hundred eighty-nine".