223208989 has 2 divisors, whose sum is σ = 223208990. Its totient is φ = 223208988.

The previous prime is 223208987. The next prime is 223209011. The reversal of 223208989 is 989802322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209033764 + 14175225 = 14458^2 + 3765^2 .

It is a cyclic number.

It is not a de Polignac number, because 223208989 - 2¹ = 223208987 is a prime.

It is a super-3 number, since 3×223208989³ (a number of 26 digits) contains 333 as substring.

Together with 223208987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223208983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111604494 + 111604495.

It is an arithmetic number, because the mean of its divisors is an integer number (111604495).

Almost surely, 2^223208989 is an apocalyptic number.

It is an amenable number.

223208989 is a deficient number, since it is larger than the sum of its proper divisors (1).

223208989 is an equidigital number, since it uses as much as digits as its factorization.

223208989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 223208989 is about 14940.1803536637. The cubic root of 223208989 is about 606.6020776479.

The spelling of 223208989 in words is "two hundred twenty-three million, two hundred eight thousand, nine hundred eighty-nine".