123503 has 2 divisors, whose sum is σ = 123504. Its totient is φ = 123502.

The previous prime is 123499. The next prime is 123517. The reversal of 123503 is 305321.

It is an a-pointer prime, because the next prime (123517) can be obtained adding 123503 to its sum of digits (14).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123503 - 2² = 123499 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61751 + 61752.

It is an arithmetic number, because the mean of its divisors is an integer number (61752).

2¹²³⁵⁰³ is an apocalyptic number.

123503 is a deficient number, since it is larger than the sum of its proper divisors (1).

123503 is an equidigital number, since it uses as much as digits as its factorization.

123503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 123503 is about 351.4299361181. The cubic root of 123503 is about 49.7995978527.

Adding to 123503 its reverse (305321), we get a palindrome (428824).

It can be divided in two parts, 123 and 503, that added together give a palindrome (626).

The spelling of 123503 in words is "one hundred twenty-three thousand, five hundred three".