13205603 has 2 divisors, whose sum is σ = 13205604. Its totient is φ = 13205602.

The previous prime is 13205537. The next prime is 13205653. The reversal of 13205603 is 30650231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13205603 - 2⁸ = 13205347 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (13205653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6602801 + 6602802.

It is an arithmetic number, because the mean of its divisors is an integer number (6602802).

Almost surely, 2^13205603 is an apocalyptic number.

13205603 is a deficient number, since it is larger than the sum of its proper divisors (1).

13205603 is an equidigital number, since it uses as much as digits as its factorization.

13205603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 13205603 is about 3633.9514306055. The cubic root of 13205603 is about 236.3665841169.

Adding to 13205603 its reverse (30650231), we get a palindrome (43855834).

The spelling of 13205603 in words is "thirteen million, two hundred five thousand, six hundred three".