13491503 has 4 divisors (see below), whose sum is σ = 13582200. Its totient is φ = 13400808.

The previous prime is 13491497. The next prime is 13491509. The reversal of 13491503 is 30519431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30519431 = 613 ⋅49787.

It is an interprime number because it is at equal distance from previous prime (13491497) and next prime (13491509).

It is a cyclic number.

It is not a de Polignac number, because 13491503 - 2¹⁰ = 13490479 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 (13491509) 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, 45125 + ... + 45422.

It is an arithmetic number, because the mean of its divisors is an integer number (3395550).

Almost surely, 2^13491503 is an apocalyptic number.

13491503 is a deficient number, since it is larger than the sum of its proper divisors (90697).

13491503 is an equidigital number, since it uses as much as digits as its factorization.

13491503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90696.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 13491503 is about 3673.0781369309. The cubic root of 13491503 is about 238.0601912116.

The spelling of 13491503 in words is "thirteen million, four hundred ninety-one thousand, five hundred three".