26891 has 2 divisors, whose sum is σ = 26892. Its totient is φ = 26890.

The previous prime is 26881. The next prime is 26893. The reversal of 26891 is 19862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26891 - 2¹⁰ = 25867 is a prime.

It is a Sophie Germain prime.

Together with 26893, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 26891.

It is not a weakly prime, because it can be changed into another prime (26893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13445 + 13446.

It is an arithmetic number, because the mean of its divisors is an integer number (13446).

2²⁶⁸⁹¹ is an apocalyptic number.

26891 is a deficient number, since it is larger than the sum of its proper divisors (1).

26891 is an equidigital number, since it uses as much as digits as its factorization.

26891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

The square root of 26891 is about 163.9847553890. The cubic root of 26891 is about 29.9595751819.

The spelling of 26891 in words is "twenty-six thousand, eight hundred ninety-one".