3689145 has 20 divisors (see below), whose sum is σ = 6613860. Its totient is φ = 1967328.

The previous prime is 3689143. The next prime is 3689149. The reversal of 3689145 is 5419863.

3689145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 826281 + 2862864 = 909^2 + 1692^2 .

It is not a de Polignac number, because 3689145 - 2¹ = 3689143 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

3689145 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3689141) 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 19 ways as a sum of consecutive naturals, for example, 4150 + ... + 4959.

It is an arithmetic number, because the mean of its divisors is an integer number (330693).

Almost surely, 2^3689145 is an apocalyptic number.

It is an amenable number.

3689145 is a deficient number, since it is larger than the sum of its proper divisors (2924715).

3689145 is an equidigital number, since it uses as much as digits as its factorization.

3689145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9126 (or 9117 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 3689145 is about 1920.7147107262. The cubic root of 3689145 is about 154.5166350266.

The spelling of 3689145 in words is "three million, six hundred eighty-nine thousand, one hundred forty-five".