13500503 has 4 divisors (see below), whose sum is σ = 13529880. Its totient is φ = 13471128.

The previous prime is 13500493. The next prime is 13500551. The reversal of 13500503 is 30500531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30500531 = 199 ⋅153269.

It is a cyclic number.

It is not a de Polignac number, because 13500503 - 2¹² = 13496407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13200503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13988 + ... + 14921.

It is an arithmetic number, because the mean of its divisors is an integer number (3382470).

Almost surely, 2^13500503 is an apocalyptic number.

13500503 is a deficient number, since it is larger than the sum of its proper divisors (29377).

13500503 is an equidigital number, since it uses as much as digits as its factorization.

13500503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29376.

The product of its (nonzero) digits is 225, while the sum is 17.

The square root of 13500503 is about 3674.3030631672. The cubic root of 13500503 is about 238.1131150279.

The spelling of 13500503 in words is "thirteen million, five hundred thousand, five hundred three".