26856647 has 2 divisors, whose sum is σ = 26856648. Its totient is φ = 26856646.

The previous prime is 26856629. The next prime is 26856649. The reversal of 26856647 is 74665862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26856647 - 2⁸ = 26856391 is a prime.

Together with 26856649, it forms a pair of twin primes.

It is a Chen prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 26856598 and 26856607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26856649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13428323 + 13428324.

It is an arithmetic number, because the mean of its divisors is an integer number (13428324).

Almost surely, 2^26856647 is an apocalyptic number.

26856647 is a deficient number, since it is larger than the sum of its proper divisors (1).

26856647 is an equidigital number, since it uses as much as digits as its factorization.

26856647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 44.

The square root of 26856647 is about 5182.3399155208. The cubic root of 26856647 is about 299.4681205344.

The spelling of 26856647 in words is "twenty-six million, eight hundred fifty-six thousand, six hundred forty-seven".