3645563 has 2 divisors, whose sum is σ = 3645564. Its totient is φ = 3645562.

The previous prime is 3645559. The next prime is 3645571. The reversal of 3645563 is 3655463.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3645563 - 2² = 3645559 is a prime.

It is not a weakly prime, because it can be changed into another prime (3645533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822781 + 1822782.

It is an arithmetic number, because the mean of its divisors is an integer number (1822782).

Almost surely, 2^3645563 is an apocalyptic number.

3645563 is a deficient number, since it is larger than the sum of its proper divisors (1).

3645563 is an equidigital number, since it uses as much as digits as its factorization.

3645563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 32.

The square root of 3645563 is about 1909.3357483690. The cubic root of 3645563 is about 153.9057583852.

Subtracting from 3645563 its product of digits (32400), we obtain a palindrome (3613163).

The spelling of 3645563 in words is "three million, six hundred forty-five thousand, five hundred sixty-three".