203123243 has 4 divisors (see below), whose sum is σ = 213813960. Its totient is φ = 192432528.

The previous prime is 203123233. The next prime is 203123251. The reversal of 203123243 is 342321302.

203123243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203123243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203123203) 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, 5345330 + ... + 5345367.

It is an arithmetic number, because the mean of its divisors is an integer number (53453490).

Almost surely, 2^203123243 is an apocalyptic number.

203123243 is a deficient number, since it is larger than the sum of its proper divisors (10690717).

203123243 is a wasteful number, since it uses less digits than its factorization.

203123243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10690716.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 203123243 is about 14252.1311739683. The cubic root of 203123243 is about 587.8319770350.

Adding to 203123243 its reverse (342321302), we get a palindrome (545444545).

The spelling of 203123243 in words is "two hundred three million, one hundred twenty-three thousand, two hundred forty-three".