13117503 has 8 divisors (see below), whose sum is σ = 19988608. Its totient is φ = 7495704.

The previous prime is 13117487. The next prime is 13117519. The reversal of 13117503 is 30571131.

13117503 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13117487) and next prime (13117519).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13117503 - 2⁴ = 13117487 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 624643 = 13117503 / (1 + 3 + 1 + 1 + 7 + 5 + 0 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13117503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13117003) 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 in 7 ways as a sum of consecutive naturals, for example, 312301 + ... + 312342.

It is an arithmetic number, because the mean of its divisors is an integer number (2498576).

Almost surely, 2^13117503 is an apocalyptic number.

13117503 is a deficient number, since it is larger than the sum of its proper divisors (6871105).

13117503 is an equidigital number, since it uses as much as digits as its factorization.

13117503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624653.

The product of its (nonzero) digits is 315, while the sum is 21.

The square root of 13117503 is about 3621.8093544526. The cubic root of 13117503 is about 235.8397780151.

Adding to 13117503 its reverse (30571131), we get a palindrome (43688634).

The spelling of 13117503 in words is "thirteen million, one hundred seventeen thousand, five hundred three".