3643543 has 4 divisors (see below), whose sum is σ = 3677080. Its totient is φ = 3610008.

The previous prime is 3643537. The next prime is 3643561. The reversal of 3643543 is 3453463.

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 3643543 - 2⁵ = 3643511 is a prime.

It is a super-3 number, since 3×3643543³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3643513) 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 in 3 ways as a sum of consecutive naturals, for example, 16605 + ... + 16822.

It is an arithmetic number, because the mean of its divisors is an integer number (919270).

Almost surely, 2^3643543 is an apocalyptic number.

3643543 is a deficient number, since it is larger than the sum of its proper divisors (33537).

3643543 is a wasteful number, since it uses less digits than its factorization.

3643543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33536.

The product of its digits is 12960, while the sum is 28.

The square root of 3643543 is about 1908.8066952942. The cubic root of 3643543 is about 153.8773268306.

It can be divided in two parts, 3643 and 543, that added together give a triangular number (4186 = T₉₁).

The spelling of 3643543 in words is "three million, six hundred forty-three thousand, five hundred forty-three".