3684649 has 4 divisors (see below), whose sum is σ = 3700180. Its totient is φ = 3669120.

The previous prime is 3684647. The next prime is 3684671. The reversal of 3684649 is 9464863.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2544025 + 1140624 = 1595^2 + 1068^2 .

It is a cyclic number.

It is not a de Polignac number, because 3684649 - 2¹ = 3684647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3684641) 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, 7404 + ... + 7885.

It is an arithmetic number, because the mean of its divisors is an integer number (925045).

Almost surely, 2^3684649 is an apocalyptic number.

It is an amenable number.

3684649 is a deficient number, since it is larger than the sum of its proper divisors (15531).

3684649 is a wasteful number, since it uses less digits than its factorization.

3684649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15530.

The product of its digits is 124416, while the sum is 40.

The square root of 3684649 is about 1919.5439562563. The cubic root of 3684649 is about 154.4538391577.

The spelling of 3684649 in words is "three million, six hundred eighty-four thousand, six hundred forty-nine".