12503903 has 2 divisors, whose sum is σ = 12503904. Its totient is φ = 12503902.

The previous prime is 12503879. The next prime is 12503917. The reversal of 12503903 is 30930521.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (30930521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12503903 - 2¹⁸ = 12241759 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12503923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6251951 + 6251952.

It is an arithmetic number, because the mean of its divisors is an integer number (6251952).

Almost surely, 2^12503903 is an apocalyptic number.

12503903 is a deficient number, since it is larger than the sum of its proper divisors (1).

12503903 is an equidigital number, since it uses as much as digits as its factorization.

12503903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 12503903 is about 3536.0858304063. The cubic root of 12503903 is about 232.1035939953.

The spelling of 12503903 in words is "twelve million, five hundred three thousand, nine hundred three".