26909 has 4 divisors (see below), whose sum is σ = 27360. Its totient is φ = 26460.

The previous prime is 26903. The next prime is 26921. The reversal of 26909 is 90962.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90962 = 2 ⋅45481.

It is a cyclic number.

It is not a de Polignac number, because 26909 - 2⁴ = 26893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26903) 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, 119 + ... + 260.

It is an arithmetic number, because the mean of its divisors is an integer number (6840).

2²⁶⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

26909 is a deficient number, since it is larger than the sum of its proper divisors (451).

26909 is an equidigital number, since it uses as much as digits as its factorization.

26909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 26909 is about 164.0396293583. The cubic root of 26909 is about 29.9662583606.

The spelling of 26909 in words is "twenty-six thousand, nine hundred nine".