26886257 has 2 divisors, whose sum is σ = 26886258. Its totient is φ = 26886256.

The previous prime is 26886239. The next prime is 26886259. The reversal of 26886257 is 75268862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24167056 + 2719201 = 4916^2 + 1649^2 .

It is a cyclic number.

It is not a de Polignac number, because 26886257 - 2⁸ = 26886001 is a prime.

Together with 26886259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26886259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13443128 + 13443129.

It is an arithmetic number, because the mean of its divisors is an integer number (13443129).

Almost surely, 2^26886257 is an apocalyptic number.

It is an amenable number.

26886257 is a deficient number, since it is larger than the sum of its proper divisors (1).

26886257 is an equidigital number, since it uses as much as digits as its factorization.

26886257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 44.

The square root of 26886257 is about 5185.1959461529. The cubic root of 26886257 is about 299.5781366788.

The spelling of 26886257 in words is "twenty-six million, eight hundred eighty-six thousand, two hundred fifty-seven".