13445503 has 2 divisors, whose sum is σ = 13445504. Its totient is φ = 13445502.

The previous prime is 13445489. The next prime is 13445519. The reversal of 13445503 is 30554431.

It is a weak prime.

It is an emirp because it is prime and its reverse (30554431) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13445503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13445543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6722751 + 6722752.

It is an arithmetic number, because the mean of its divisors is an integer number (6722752).

Almost surely, 2^13445503 is an apocalyptic number.

13445503 is a deficient number, since it is larger than the sum of its proper divisors (1).

13445503 is an equidigital number, since it uses as much as digits as its factorization.

13445503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 13445503 is about 3666.8110123103. The cubic root of 13445503 is about 237.7893234868.

Adding to 13445503 its reverse (30554431), we get a palindrome (43999934).

The spelling of 13445503 in words is "thirteen million, four hundred forty-five thousand, five hundred three".