3649439 has 4 divisors (see below), whose sum is σ = 3654456. Its totient is φ = 3644424.

The previous prime is 3649417. The next prime is 3649469. The reversal of 3649439 is 9349463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9349463 = 19 ⋅492077.

It is a cyclic number.

It is not a de Polignac number, because 3649439 - 2¹⁶ = 3583903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1184 + ... + 2949.

It is an arithmetic number, because the mean of its divisors is an integer number (913614).

Almost surely, 2^3649439 is an apocalyptic number.

3649439 is a deficient number, since it is larger than the sum of its proper divisors (5017).

3649439 is an equidigital number, since it uses as much as digits as its factorization.

3649439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5016.

The product of its digits is 69984, while the sum is 38.

The square root of 3649439 is about 1910.3504914020. The cubic root of 3649439 is about 153.9602837931.

The spelling of 3649439 in words is "three million, six hundred forty-nine thousand, four hundred thirty-nine".