3657589 has 4 divisors (see below), whose sum is σ = 3938956. Its totient is φ = 3376224.

The previous prime is 3657571. The next prime is 3657607. The reversal of 3657589 is 9857563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9857563 = 461 ⋅21383.

It is an interprime number because it is at equal distance from previous prime (3657571) and next prime (3657607).

It can be written as a sum of positive squares in 2 ways, for example, as 935089 + 2722500 = 967^2 + 1650^2 .

It is a cyclic number.

It is not a de Polignac number, because 3657589 - 2¹¹ = 3655541 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 (3657539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140664 + ... + 140689.

It is an arithmetic number, because the mean of its divisors is an integer number (984739).

Almost surely, 2^3657589 is an apocalyptic number.

It is an amenable number.

3657589 is a deficient number, since it is larger than the sum of its proper divisors (281367).

3657589 is a wasteful number, since it uses less digits than its factorization.

3657589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281366.

The product of its digits is 226800, while the sum is 43.

The square root of 3657589 is about 1912.4824182198. The cubic root of 3657589 is about 154.0748076424.

The spelling of 3657589 in words is "three million, six hundred fifty-seven thousand, five hundred eighty-nine".