203123340313 has 4 divisors (see below), whose sum is σ = 203124352948. Its totient is φ = 203122327680.

The previous prime is 203123340269. The next prime is 203123340341. The reversal of 203123340313 is 313043321302.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 32246103184 + 170877237129 = 179572^2 + 413373^2 .

It is a cyclic number.

It is not a de Polignac number, because 203123340313 - 2²¹ = 203121243161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203123340373) 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, 92928 + ... + 644113.

It is an arithmetic number, because the mean of its divisors is an integer number (50781088237).

Almost surely, 2^203123340313 is an apocalyptic number.

It is an amenable number.

203123340313 is a deficient number, since it is larger than the sum of its proper divisors (1012635).

203123340313 is an equidigital number, since it uses as much as digits as its factorization.

203123340313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012634.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 203123340313 its reverse (313043321302), we get a palindrome (516166661615).

The spelling of 203123340313 in words is "two hundred three billion, one hundred twenty-three million, three hundred forty thousand, three hundred thirteen".