26919689 has 2 divisors, whose sum is σ = 26919690. Its totient is φ = 26919688.

The previous prime is 26919679. The next prime is 26919701. The reversal of 26919689 is 98691962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14899600 + 12020089 = 3860^2 + 3467^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26919689 is a prime.

It is not a weakly prime, because it can be changed into another prime (26919649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13459844 + 13459845.

It is an arithmetic number, because the mean of its divisors is an integer number (13459845).

Almost surely, 2^26919689 is an apocalyptic number.

It is an amenable number.

26919689 is a deficient number, since it is larger than the sum of its proper divisors (1).

26919689 is an equidigital number, since it uses as much as digits as its factorization.

26919689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 50.

The square root of 26919689 is about 5188.4187379201. The cubic root of 26919689 is about 299.7022564455.

The spelling of 26919689 in words is "twenty-six million, nine hundred nineteen thousand, six hundred eighty-nine".