223668919 has 4 divisors (see below), whose sum is σ = 224302896. Its totient is φ = 223034944.

The previous prime is 223668839. The next prime is 223668943. The reversal of 223668919 is 919866322.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 223668919 - 2¹³ = 223660727 is a prime.

It is a super-2 number, since 2×223668919² = 100055570653257122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223668989) 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 in 3 ways as a sum of consecutive naturals, for example, 316459 + ... + 317164.

It is an arithmetic number, because the mean of its divisors is an integer number (56075724).

Almost surely, 2^223668919 is an apocalyptic number.

223668919 is a deficient number, since it is larger than the sum of its proper divisors (633977).

223668919 is an equidigital number, since it uses as much as digits as its factorization.

223668919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633976.

The product of its digits is 279936, while the sum is 46.

The square root of 223668919 is about 14955.5648171508. The cubic root of 223668919 is about 607.0184334704.

The spelling of 223668919 in words is "two hundred twenty-three million, six hundred sixty-eight thousand, nine hundred nineteen".