2639589 has 4 divisors (see below), whose sum is σ = 3519456. Its totient is φ = 1759724.

The previous prime is 2639587. The next prime is 2639597. The reversal of 2639589 is 9859362.

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 2639589 - 2¹ = 2639587 is a prime.

It is a D-number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2639589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639587) 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, 439929 + ... + 439934.

It is an arithmetic number, because the mean of its divisors is an integer number (879864).

2^2639589 is an apocalyptic number.

It is an amenable number.

2639589 is a deficient number, since it is larger than the sum of its proper divisors (879867).

2639589 is an equidigital number, since it uses as much as digits as its factorization.

2639589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879866.

The product of its digits is 116640, while the sum is 42.

The square root of 2639589 is about 1624.6811994973. The cubic root of 2639589 is about 138.2012920463.

The spelling of 2639589 in words is "two million, six hundred thirty-nine thousand, five hundred eighty-nine".