3685749 has 4 divisors (see below), whose sum is σ = 4914336. Its totient is φ = 2457164.

The previous prime is 3685741. The next prime is 3685751. The reversal of 3685749 is 9475863.

It is a happy number.

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 3685749 - 2³ = 3685741 is a prime.

It is an Ulam number.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 3685749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3685741) 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, 614289 + ... + 614294.

It is an arithmetic number, because the mean of its divisors is an integer number (1228584).

Almost surely, 2^3685749 is an apocalyptic number.

It is an amenable number.

3685749 is a deficient number, since it is larger than the sum of its proper divisors (1228587).

3685749 is a wasteful number, since it uses less digits than its factorization.

3685749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228586.

The product of its digits is 181440, while the sum is 42.

The square root of 3685749 is about 1919.8304612647. The cubic root of 3685749 is about 154.4692076337.

The spelling of 3685749 in words is "three million, six hundred eighty-five thousand, seven hundred forty-nine".