223974707665 has 4 divisors (see below), whose sum is σ = 268769649204. Its totient is φ = 179179766128.

The previous prime is 223974707653. The next prime is 223974707689. The reversal of 223974707665 is 566707479322.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51841825344 + 172132882321 = 227688^2 + 414889^2 .

It is a cyclic number.

It is not a de Polignac number, because 223974707665 - 2⁹ = 223974707153 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22397470762 + ... + 22397470771.

It is an arithmetic number, because the mean of its divisors is an integer number (67192412301).

Almost surely, 2^223974707665 is an apocalyptic number.

It is an amenable number.

223974707665 is a deficient number, since it is larger than the sum of its proper divisors (44794941539).

223974707665 is an equidigital number, since it uses as much as digits as its factorization.

223974707665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44794941538.

The product of its (nonzero) digits is 26671680, while the sum is 58.

The spelling of 223974707665 in words is "two hundred twenty-three billion, nine hundred seventy-four million, seven hundred seven thousand, six hundred sixty-five".