16604503 has 2 divisors, whose sum is σ = 16604504. Its totient is φ = 16604502.

The previous prime is 16604491. The next prime is 16604509. The reversal of 16604503 is 30540661.

It is a strong prime.

It is an emirp because it is prime and its reverse (30540661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16604503 - 2⁹ = 16603991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16604509) 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, 8302251 + 8302252.

It is an arithmetic number, because the mean of its divisors is an integer number (8302252).

Almost surely, 2^16604503 is an apocalyptic number.

16604503 is a deficient number, since it is larger than the sum of its proper divisors (1).

16604503 is an equidigital number, since it uses as much as digits as its factorization.

16604503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 16604503 is about 4074.8623289628. The cubic root of 16604503 is about 255.1185044481.

The spelling of 16604503 in words is "sixteen million, six hundred four thousand, five hundred three".