26805239 has 2 divisors, whose sum is σ = 26805240. Its totient is φ = 26805238.

The previous prime is 26805221. The next prime is 26805241. The reversal of 26805239 is 93250862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26805239 - 2¹⁶ = 26739703 is a prime.

Together with 26805241, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 26805199 and 26805208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26805739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13402619 + 13402620.

It is an arithmetic number, because the mean of its divisors is an integer number (13402620).

Almost surely, 2^26805239 is an apocalyptic number.

26805239 is a deficient number, since it is larger than the sum of its proper divisors (1).

26805239 is an equidigital number, since it uses as much as digits as its factorization.

26805239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 26805239 is about 5177.3776180611. The cubic root of 26805239 is about 299.2769215550.

The spelling of 26805239 in words is "twenty-six million, eight hundred five thousand, two hundred thirty-nine".