203023013 has 4 divisors (see below), whose sum is σ = 203485920. Its totient is φ = 202560108.

The previous prime is 203023003. The next prime is 203023031. The reversal of 203023013 is 310320302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310320302 = 2 ⋅155160151.

It is a cyclic number.

It is not a de Polignac number, because 203023013 - 2⁶ = 203022949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203023003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230795 + ... + 231672.

It is an arithmetic number, because the mean of its divisors is an integer number (50871480).

Almost surely, 2^203023013 is an apocalyptic number.

It is an amenable number.

203023013 is a deficient number, since it is larger than the sum of its proper divisors (462907).

203023013 is an equidigital number, since it uses as much as digits as its factorization.

203023013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462906.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 203023013 is about 14248.6144238659. The cubic root of 203023013 is about 587.7352736875.

Adding to 203023013 its reverse (310320302), we get a palindrome (513343315).

The spelling of 203023013 in words is "two hundred three million, twenty-three thousand, thirteen".