3646563 has 4 divisors (see below), whose sum is σ = 4862088. Its totient is φ = 2431040.

The previous prime is 3646553. The next prime is 3646567. The reversal of 3646563 is 3656463.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3656463 = 3 ⋅1218821.

It is a cyclic number.

It is not a de Polignac number, because 3646563 - 2¹⁰ = 3645539 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3646567) 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, 607758 + ... + 607763.

It is an arithmetic number, because the mean of its divisors is an integer number (1215522).

Almost surely, 2^3646563 is an apocalyptic number.

3646563 is a deficient number, since it is larger than the sum of its proper divisors (1215525).

3646563 is a wasteful number, since it uses less digits than its factorization.

3646563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215524.

The product of its digits is 38880, while the sum is 33.

The square root of 3646563 is about 1909.5976015905. The cubic root of 3646563 is about 153.9198295258.

The spelling of 3646563 in words is "three million, six hundred forty-six thousand, five hundred sixty-three".