3655749 has 4 divisors (see below), whose sum is σ = 4874336. Its totient is φ = 2437164.

The previous prime is 3655747. The next prime is 3655753. The reversal of 3655749 is 9475563.

3655749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 3655749 - 2¹ = 3655747 is a prime.

It is a d-powerful number, because it can be written as 3⁸ + 6⁸ + 5 + 5⁹ + 7² + 4⁷ + 9 .

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3655741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609289 + ... + 609294.

It is an arithmetic number, because the mean of its divisors is an integer number (1218584).

Almost surely, 2^3655749 is an apocalyptic number.

It is an amenable number.

3655749 is a deficient number, since it is larger than the sum of its proper divisors (1218587).

3655749 is a wasteful number, since it uses less digits than its factorization.

3655749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218586.

The product of its digits is 113400, while the sum is 39.

The square root of 3655749 is about 1912.0013075309. The cubic root of 3655749 is about 154.0489668314.

The spelling of 3655749 in words is "three million, six hundred fifty-five thousand, seven hundred forty-nine".