26808169 has 2 divisors, whose sum is σ = 26808170. Its totient is φ = 26808168.

The previous prime is 26808143. The next prime is 26808217. The reversal of 26808169 is 96180862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24206400 + 2601769 = 4920^2 + 1613^2 .

It is a cyclic number.

It is not a de Polignac number, because 26808169 - 2¹³ = 26799977 is a prime.

It is a super-2 number, since 2×26808169² = 1437355850265122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26808139) 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, 13404084 + 13404085.

It is an arithmetic number, because the mean of its divisors is an integer number (13404085).

Almost surely, 2^26808169 is an apocalyptic number.

It is an amenable number.

26808169 is a deficient number, since it is larger than the sum of its proper divisors (1).

26808169 is an equidigital number, since it uses as much as digits as its factorization.

26808169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 26808169 is about 5177.6605721117. The cubic root of 26808169 is about 299.2878255110.

The spelling of 26808169 in words is "twenty-six million, eight hundred eight thousand, one hundred sixty-nine".