1103603 has 2 divisors, whose sum is σ = 1103604. Its totient is φ = 1103602.

The previous prime is 1103591. The next prime is 1103611. The reversal of 1103603 is 3063011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1103603 - 2⁴ = 1103587 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1103633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551801 + 551802.

It is an arithmetic number, because the mean of its divisors is an integer number (551802).

2^1103603 is an apocalyptic number.

1103603 is a deficient number, since it is larger than the sum of its proper divisors (1).

1103603 is an equidigital number, since it uses as much as digits as its factorization.

1103603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 1103603 is about 1050.5251067918. The cubic root of 1103603 is about 103.3405949342.

Adding to 1103603 its reverse (3063011), we get a palindrome (4166614).

The spelling of 1103603 in words is "one million, one hundred three thousand, six hundred three".