3643849 has 4 divisors (see below), whose sum is σ = 3975120. Its totient is φ = 3312580.

The previous prime is 3643841. The next prime is 3643853. The reversal of 3643849 is 9483463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3643849 - 2³ = 3643841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3643841) 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, 165619 + ... + 165640.

It is an arithmetic number, because the mean of its divisors is an integer number (993780).

Almost surely, 2^3643849 is an apocalyptic number.

It is an amenable number.

3643849 is a deficient number, since it is larger than the sum of its proper divisors (331271).

3643849 is a wasteful number, since it uses less digits than its factorization.

3643849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331270.

The product of its digits is 62208, while the sum is 37.

The square root of 3643849 is about 1908.8868484014. The cubic root of 3643849 is about 153.8816344641.

The spelling of 3643849 in words is "three million, six hundred forty-three thousand, eight hundred forty-nine".