223905689 has 4 divisors (see below), whose sum is σ = 255892224. Its totient is φ = 191919156.

The previous prime is 223905683. The next prime is 223905701. The reversal of 223905689 is 986509322.

223905689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 986509322 = 2 ⋅493254661.

It is a cyclic number.

It is not a de Polignac number, because 223905689 - 2¹⁶ = 223840153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (223905683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15993257 + ... + 15993270.

It is an arithmetic number, because the mean of its divisors is an integer number (63973056).

Almost surely, 2^223905689 is an apocalyptic number.

It is an amenable number.

223905689 is a deficient number, since it is larger than the sum of its proper divisors (31986535).

223905689 is an equidigital number, since it uses as much as digits as its factorization.

223905689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31986534.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 223905689 is about 14963.4785060159. The cubic root of 223905689 is about 607.2325491537.

The spelling of 223905689 in words is "two hundred twenty-three million, nine hundred five thousand, six hundred eighty-nine".