26865197 has 2 divisors, whose sum is σ = 26865198. Its totient is φ = 26865196.

The previous prime is 26865161. The next prime is 26865203. The reversal of 26865197 is 79156862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18139081 + 8726116 = 4259^2 + 2954^2 .

It is a cyclic number.

It is not a de Polignac number, because 26865197 - 2¹² = 26861101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26862197) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13432598 + 13432599.

It is an arithmetic number, because the mean of its divisors is an integer number (13432599).

Almost surely, 2^26865197 is an apocalyptic number.

It is an amenable number.

26865197 is a deficient number, since it is larger than the sum of its proper divisors (1).

26865197 is an equidigital number, since it uses as much as digits as its factorization.

26865197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 26865197 is about 5183.1647668196. The cubic root of 26865197 is about 299.4998964142.

The spelling of 26865197 in words is "twenty-six million, eight hundred sixty-five thousand, one hundred ninety-seven".