2643589 has 4 divisors (see below), whose sum is σ = 2846956. Its totient is φ = 2440224.

The previous prime is 2643583. The next prime is 2643593. The reversal of 2643589 is 9853462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9853462 = 2 ⋅4926731.

It can be written as a sum of positive squares in 2 ways, for example, as 216225 + 2427364 = 465^2 + 1558^2 .

It is a cyclic number.

It is not a de Polignac number, because 2643589 - 2³ = 2643581 is a prime.

It is a d-powerful number, because it can be written as 2⁹ + 6² + 4¹⁰ + 3¹³ + 5³ + 8 + 9 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643581) 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, 101664 + ... + 101689.

It is an arithmetic number, because the mean of its divisors is an integer number (711739).

2^2643589 is an apocalyptic number.

It is an amenable number.

2643589 is a deficient number, since it is larger than the sum of its proper divisors (203367).

2643589 is a wasteful number, since it uses less digits than its factorization.

2643589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203366.

The product of its digits is 51840, while the sum is 37.

The square root of 2643589 is about 1625.9117442223. The cubic root of 2643589 is about 138.2710663136.

The spelling of 2643589 in words is "two million, six hundred forty-three thousand, five hundred eighty-nine".