1223040653 has 4 divisors (see below), whose sum is σ = 1223126268. Its totient is φ = 1222955040.

The previous prime is 1223040649. The next prime is 1223040743. The reversal of 1223040653 is 3560403221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3560403221 = 1091 ⋅3263431.

It can be written as a sum of positive squares in 2 ways, for example, as 813504484 + 409536169 = 28522^2 + 20237^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223040653 - 2² = 1223040649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223040853) 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, 15626 + ... + 51867.

It is an arithmetic number, because the mean of its divisors is an integer number (305781567).

Almost surely, 2^1223040653 is an apocalyptic number.

It is an amenable number.

1223040653 is a deficient number, since it is larger than the sum of its proper divisors (85615).

1223040653 is an equidigital number, since it uses as much as digits as its factorization.

1223040653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85614.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 1223040653 is about 34971.9981270730. The cubic root of 1223040653 is about 1069.4167062786.

Adding to 1223040653 its reverse (3560403221), we get a palindrome (4783443874).

The spelling of 1223040653 in words is "one billion, two hundred twenty-three million, forty thousand, six hundred fifty-three".