3643667 has 4 divisors (see below), whose sum is σ = 3647616. Its totient is φ = 3639720.

The previous prime is 3643657. The next prime is 3643669. The reversal of 3643667 is 7663463.

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 3643667 - 2⁶ = 3643603 is a prime.

It is a d-powerful number, because it can be written as 3¹¹ + 6 + 4¹⁰ + 3¹³ + 6² + 6² + 7⁷ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3643669) 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, 233 + ... + 2709.

It is an arithmetic number, because the mean of its divisors is an integer number (911904).

Almost surely, 2^3643667 is an apocalyptic number.

3643667 is a deficient number, since it is larger than the sum of its proper divisors (3949).

3643667 is a wasteful number, since it uses less digits than its factorization.

3643667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948.

The product of its digits is 54432, while the sum is 35.

The square root of 3643667 is about 1908.8391760439. The cubic root of 3643667 is about 153.8790724366.

The spelling of 3643667 in words is "three million, six hundred forty-three thousand, six hundred sixty-seven".