13191603 has 4 divisors (see below), whose sum is σ = 17588808. Its totient is φ = 8794400.

The previous prime is 13191601. The next prime is 13191613. The reversal of 13191603 is 30619131.

13191603 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13191603 - 2¹ = 13191601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13191601) 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, 2198598 + ... + 2198603.

It is an arithmetic number, because the mean of its divisors is an integer number (4397202).

Almost surely, 2^13191603 is an apocalyptic number.

13191603 is a deficient number, since it is larger than the sum of its proper divisors (4397205).

13191603 is an equidigital number, since it uses as much as digits as its factorization.

13191603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4397204.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 13191603 is about 3632.0246419869. The cubic root of 13191603 is about 236.2830260932.

The spelling of 13191603 in words is "thirteen million, one hundred ninety-one thousand, six hundred three".