203103305623 has 2 divisors, whose sum is σ = 203103305624. Its totient is φ = 203103305622.

The previous prime is 203103305593. The next prime is 203103305651. The reversal of 203103305623 is 326503301302.

It is an a-pointer prime, because the next prime (203103305651) can be obtained adding 203103305623 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203103305623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203103305591 and 203103305600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203103305693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101551652811 + 101551652812.

It is an arithmetic number, because the mean of its divisors is an integer number (101551652812).

Almost surely, 2^203103305623 is an apocalyptic number.

203103305623 is a deficient number, since it is larger than the sum of its proper divisors (1).

203103305623 is an equidigital number, since it uses as much as digits as its factorization.

203103305623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 28.

Adding to 203103305623 its reverse (326503301302), we get a palindrome (529606606925).

The spelling of 203103305623 in words is "two hundred three billion, one hundred three million, three hundred five thousand, six hundred twenty-three".