1223204023 has 4 divisors (see below), whose sum is σ = 1227620200. Its totient is φ = 1218787848.

The previous prime is 1223204011. The next prime is 1223204041. The reversal of 1223204023 is 3204023221.

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 1223204023 - 2⁹ = 1223203511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223204083) 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, 2207673 + ... + 2208226.

It is an arithmetic number, because the mean of its divisors is an integer number (306905050).

Almost surely, 2^1223204023 is an apocalyptic number.

1223204023 is a deficient number, since it is larger than the sum of its proper divisors (4416177).

1223204023 is an equidigital number, since it uses as much as digits as its factorization.

1223204023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4416176.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1223204023 is about 34974.3337749270. Note that the first 3 decimals coincide. The cubic root of 1223204023 is about 1069.4643206209.

Adding to 1223204023 its reverse (3204023221), we get a palindrome (4427227244).

The spelling of 1223204023 in words is "one billion, two hundred twenty-three million, two hundred four thousand, twenty-three".