3656563 has 4 divisors (see below), whose sum is σ = 3815568. Its totient is φ = 3497560.

The previous prime is 3656561. The next prime is 3656573.

It is a happy number.

3656563 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3656563 - 2¹ = 3656561 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3656561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79468 + ... + 79513.

It is an arithmetic number, because the mean of its divisors is an integer number (953892).

Almost surely, 2^3656563 is an apocalyptic number.

3656563 is a deficient number, since it is larger than the sum of its proper divisors (159005).

3656563 is a wasteful number, since it uses less digits than its factorization.

3656563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159004.

The product of its digits is 48600, while the sum is 34.

The square root of 3656563 is about 1912.2141616461. The cubic root of 3656563 is about 154.0603996507.

The spelling of 3656563 in words is "three million, six hundred fifty-six thousand, five hundred sixty-three".