3651563 has 4 divisors (see below), whose sum is σ = 3655608. Its totient is φ = 3647520.

The previous prime is 3651559. The next prime is 3651607.

3651563 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3651563 - 2² = 3651559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3651463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20 + ... + 2702.

It is an arithmetic number, because the mean of its divisors is an integer number (913902).

Almost surely, 2^3651563 is an apocalyptic number.

3651563 is a deficient number, since it is larger than the sum of its proper divisors (4045).

3651563 is a wasteful number, since it uses less digits than its factorization.

3651563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044.

The product of its digits is 8100, while the sum is 29.

The square root of 3651563 is about 1910.9063294678. The cubic root of 3651563 is about 153.9901466682.

Subtracting from 3651563 its product of digits (8100), we obtain a palindrome (3643463).

The spelling of 3651563 in words is "three million, six hundred fifty-one thousand, five hundred sixty-three".