26868217 has 2 divisors, whose sum is σ = 26868218. Its totient is φ = 26868216.

The previous prime is 26868199. The next prime is 26868229. The reversal of 26868217 is 71286862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18481401 + 8386816 = 4299^2 + 2896^2 .

It is a cyclic number.

It is not a de Polignac number, because 26868217 - 2¹⁹ = 26343929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26868217.

It is not a weakly prime, because it can be changed into another prime (26868287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13434108 + 13434109.

It is an arithmetic number, because the mean of its divisors is an integer number (13434109).

Almost surely, 2^26868217 is an apocalyptic number.

It is an amenable number.

26868217 is a deficient number, since it is larger than the sum of its proper divisors (1).

26868217 is an equidigital number, since it uses as much as digits as its factorization.

26868217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 40.

The square root of 26868217 is about 5183.4560864350. The cubic root of 26868217 is about 299.5111185640.

The spelling of 26868217 in words is "twenty-six million, eight hundred sixty-eight thousand, two hundred seventeen".