26091589 has 4 divisors (see below), whose sum is σ = 26166700. Its totient is φ = 26016480.

The previous prime is 26091581. The next prime is 26091601. The reversal of 26091589 is 98519062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98519062 = 2 ⋅49259531.

It can be written as a sum of positive squares in 2 ways, for example, as 13432225 + 12659364 = 3665^2 + 3558^2 .

It is a cyclic number.

It is not a de Polignac number, because 26091589 - 2³ = 26091581 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 (26091581) 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, 37032 + ... + 37729.

It is an arithmetic number, because the mean of its divisors is an integer number (6541675).

Almost surely, 2^26091589 is an apocalyptic number.

It is an amenable number.

26091589 is a deficient number, since it is larger than the sum of its proper divisors (75111).

26091589 is an equidigital number, since it uses as much as digits as its factorization.

26091589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75110.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 26091589 is about 5107.9926585695. The cubic root of 26091589 is about 296.5970607786.

The spelling of 26091589 in words is "twenty-six million, ninety-one thousand, five hundred eighty-nine".