26890117 has 2 divisors, whose sum is σ = 26890118. Its totient is φ = 26890116.

The previous prime is 26890079. The next prime is 26890121. The reversal of 26890117 is 71109862.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14737921 + 12152196 = 3839^2 + 3486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26890117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26890147) 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, 13445058 + 13445059.

It is an arithmetic number, because the mean of its divisors is an integer number (13445059).

Almost surely, 2^26890117 is an apocalyptic number.

It is an amenable number.

26890117 is a deficient number, since it is larger than the sum of its proper divisors (1).

26890117 is an equidigital number, since it uses as much as digits as its factorization.

26890117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 26890117 is about 5185.5681463076. The cubic root of 26890117 is about 299.5924725813.

Adding to 26890117 its reverse (71109862), we get a palindrome (97999979).

The spelling of 26890117 in words is "twenty-six million, eight hundred ninety thousand, one hundred seventeen".