223744643 has 4 divisors (see below), whose sum is σ = 226896048. Its totient is φ = 220593240.

The previous prime is 223744601. The next prime is 223744649. The reversal of 223744643 is 346447322.

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 223744643 - 2¹⁴ = 223728259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223744649) 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, 1575596 + ... + 1575737.

It is an arithmetic number, because the mean of its divisors is an integer number (56724012).

Almost surely, 2^223744643 is an apocalyptic number.

223744643 is a deficient number, since it is larger than the sum of its proper divisors (3151405).

223744643 is an equidigital number, since it uses as much as digits as its factorization.

223744643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3151404.

The product of its digits is 96768, while the sum is 35.

The square root of 223744643 is about 14958.0962358182. The cubic root of 223744643 is about 607.0869285743.

The spelling of 223744643 in words is "two hundred twenty-three million, seven hundred forty-four thousand, six hundred forty-three".