26809243 has 2 divisors, whose sum is σ = 26809244. Its totient is φ = 26809242.

The previous prime is 26809231. The next prime is 26809261. The reversal of 26809243 is 34290862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26809243 - 2¹³ = 26801051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26809199 and 26809208.

It is not a weakly prime, because it can be changed into another prime (26809273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13404621 + 13404622.

It is an arithmetic number, because the mean of its divisors is an integer number (13404622).

Almost surely, 2^26809243 is an apocalyptic number.

26809243 is a deficient number, since it is larger than the sum of its proper divisors (1).

26809243 is an equidigital number, since it uses as much as digits as its factorization.

26809243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 26809243 is about 5177.7642858670. The cubic root of 26809243 is about 299.2918221886.

The spelling of 26809243 in words is "twenty-six million, eight hundred nine thousand, two hundred forty-three".