13206563 has 2 divisors, whose sum is σ = 13206564. Its totient is φ = 13206562.

The previous prime is 13206553. The next prime is 13206581. The reversal of 13206563 is 36560231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13206563 - 2⁸ = 13206307 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13206553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6603281 + 6603282.

It is an arithmetic number, because the mean of its divisors is an integer number (6603282).

Almost surely, 2^13206563 is an apocalyptic number.

13206563 is a deficient number, since it is larger than the sum of its proper divisors (1).

13206563 is an equidigital number, since it uses as much as digits as its factorization.

13206563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 13206563 is about 3634.0835158262. The cubic root of 13206563 is about 236.3723116459.

Adding to 13206563 its reverse (36560231), we get a palindrome (49766794).

The spelling of 13206563 in words is "thirteen million, two hundred six thousand, five hundred sixty-three".