123315503 has 2 divisors, whose sum is σ = 123315504. Its totient is φ = 123315502.

The previous prime is 123315497. The next prime is 123315527. The reversal of 123315503 is 305513321.

It is a weak prime.

It is an emirp because it is prime and its reverse (305513321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123315503 - 2¹⁶ = 123249967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123315583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61657751 + 61657752.

It is an arithmetic number, because the mean of its divisors is an integer number (61657752).

Almost surely, 2^123315503 is an apocalyptic number.

123315503 is a deficient number, since it is larger than the sum of its proper divisors (1).

123315503 is an equidigital number, since it uses as much as digits as its factorization.

123315503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 123315503 is about 11104.7513704720. The cubic root of 123315503 is about 497.7438387858.

Adding to 123315503 its reverse (305513321), we get a palindrome (428828824).

The spelling of 123315503 in words is "one hundred twenty-three million, three hundred fifteen thousand, five hundred three".