11191603 has 2 divisors, whose sum is σ = 11191604. Its totient is φ = 11191602.

The previous prime is 11191597. The next prime is 11191657. The reversal of 11191603 is 30619111.

It is a happy number.

11191603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (30619111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11191603 - 2⁵ = 11191571 is a prime.

It is not a weakly prime, because it can be changed into another prime (11191903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5595801 + 5595802.

It is an arithmetic number, because the mean of its divisors is an integer number (5595802).

Almost surely, 2^11191603 is an apocalyptic number.

11191603 is a deficient number, since it is larger than the sum of its proper divisors (1).

11191603 is an equidigital number, since it uses as much as digits as its factorization.

11191603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 11191603 is about 3345.3853290765. The cubic root of 11191603 is about 223.6818599663.

The spelling of 11191603 in words is "eleven million, one hundred ninety-one thousand, six hundred three".