26859689 has 2 divisors, whose sum is σ = 26859690. Its totient is φ = 26859688.

The previous prime is 26859641. The next prime is 26859709. The reversal of 26859689 is 98695862.

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., 25928464 + 931225 = 5092^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 26859689 - 2⁸ = 26859433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26859689.

It is not a weakly prime, because it can be changed into another prime (26859589) 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, 13429844 + 13429845.

It is an arithmetic number, because the mean of its divisors is an integer number (13429845).

Almost surely, 2^26859689 is an apocalyptic number.

It is an amenable number.

26859689 is a deficient number, since it is larger than the sum of its proper divisors (1).

26859689 is an equidigital number, since it uses as much as digits as its factorization.

26859689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 53.

The square root of 26859689 is about 5182.6334039752. The cubic root of 26859689 is about 299.4794268307.

The spelling of 26859689 in words is "twenty-six million, eight hundred fifty-nine thousand, six hundred eighty-nine".