1243068823 has 4 divisors (see below), whose sum is σ = 1249315600. Its totient is φ = 1236822048.

The previous prime is 1243068821. The next prime is 1243068877. The reversal of 1243068823 is 3288603421.

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 1243068823 - 2¹ = 1243068821 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 (1243068821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3123090 + ... + 3123487.

It is an arithmetic number, because the mean of its divisors is an integer number (312328900).

Almost surely, 2^1243068823 is an apocalyptic number.

1243068823 is a deficient number, since it is larger than the sum of its proper divisors (6246777).

1243068823 is an equidigital number, since it uses as much as digits as its factorization.

1243068823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6246776.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 1243068823 is about 35257.1811550498. The cubic root of 1243068823 is about 1075.2226178222. Note that the first 3 decimals are identical.

The spelling of 1243068823 in words is "one billion, two hundred forty-three million, sixty-eight thousand, eight hundred twenty-three".