1323538043803 has 4 divisors (see below), whose sum is σ = 1323557970568. Its totient is φ = 1323518117040.

The previous prime is 1323538043743. The next prime is 1323538043809. The reversal of 1323538043803 is 3083408353231.

It is a happy number.

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 1323538043803 - 2¹⁷ = 1323537912731 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1323538043803.

It is not an unprimeable number, because it can be changed into a prime (1323538043809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9863418 + ... + 9996703.

It is an arithmetic number, because the mean of its divisors is an integer number (330889492642).

Almost surely, 2^{1323538043803} is an apocalyptic number.

1323538043803 is a deficient number, since it is larger than the sum of its proper divisors (19926765).

1323538043803 is an equidigital number, since it uses as much as digits as its factorization.

1323538043803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19926764.

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 1323538043803 in words is "one trillion, three hundred twenty-three billion, five hundred thirty-eight million, forty-three thousand, eight hundred three".