26808217 has 2 divisors, whose sum is σ = 26808218. Its totient is φ = 26808216.

The previous prime is 26808169. The next prime is 26808227. The reversal of 26808217 is 71280862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25765776 + 1042441 = 5076^2 + 1021^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26808217 is a prime.

It is not a weakly prime, because it can be changed into another prime (26808227) 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, 13404108 + 13404109.

It is an arithmetic number, because the mean of its divisors is an integer number (13404109).

Almost surely, 2^26808217 is an apocalyptic number.

It is an amenable number.

26808217 is a deficient number, since it is larger than the sum of its proper divisors (1).

26808217 is an equidigital number, since it uses as much as digits as its factorization.

26808217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 26808217 is about 5177.6652074077. The cubic root of 26808217 is about 299.2880041357.

The spelling of 26808217 in words is "twenty-six million, eight hundred eight thousand, two hundred seventeen".