1243204323 has 4 divisors (see below), whose sum is σ = 1657605768. Its totient is φ = 828802880.

The previous prime is 1243204321. The next prime is 1243204327. The reversal of 1243204323 is 3234023421.

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 1243204323 - 2¹ = 1243204321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1243204293 and 1243204302.

It is not an unprimeable number, because it can be changed into a prime (1243204321) 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, 207200718 + ... + 207200723.

It is an arithmetic number, because the mean of its divisors is an integer number (414401442).

Almost surely, 2^1243204323 is an apocalyptic number.

1243204323 is a deficient number, since it is larger than the sum of its proper divisors (414401445).

1243204323 is an equidigital number, since it uses as much as digits as its factorization.

1243204323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414401444.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 1243204323 is about 35259.1026970341. The cubic root of 1243204323 is about 1075.2616844098.

Adding to 1243204323 its reverse (3234023421), we get a palindrome (4477227744).

The spelling of 1243204323 in words is "one billion, two hundred forty-three million, two hundred four thousand, three hundred twenty-three".