223684289 has 2 divisors, whose sum is σ = 223684290. Its totient is φ = 223684288.

The previous prime is 223684273. The next prime is 223684297. The reversal of 223684289 is 982486322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167314225 + 56370064 = 12935^2 + 7508^2 .

It is a cyclic number.

It is not a de Polignac number, because 223684289 - 2⁴ = 223684273 is a prime.

It is a super-2 number, since 2×223684289² = 100069322290871042, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (223683289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111842144 + 111842145.

It is an arithmetic number, because the mean of its divisors is an integer number (111842145).

Almost surely, 2^223684289 is an apocalyptic number.

It is an amenable number.

223684289 is a deficient number, since it is larger than the sum of its proper divisors (1).

223684289 is an equidigital number, since it uses as much as digits as its factorization.

223684289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 44.

The square root of 223684289 is about 14956.0786638744. The cubic root of 223684289 is about 607.0323374431.

The spelling of 223684289 in words is "two hundred twenty-three million, six hundred eighty-four thousand, two hundred eighty-nine".