26255689 has 2 divisors, whose sum is σ = 26255690. Its totient is φ = 26255688.

The previous prime is 26255687. The next prime is 26255693. The reversal of 26255689 is 98655262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26091664 + 164025 = 5108^2 + 405^2 .

It is a cyclic number.

It is not a de Polignac number, because 26255689 - 2¹ = 26255687 is a prime.

It is a super-2 number, since 2×26255689² = 1378722409729442, which contains 22 as substring.

Together with 26255687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (26255687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13127844 + 13127845.

It is an arithmetic number, because the mean of its divisors is an integer number (13127845).

Almost surely, 2^26255689 is an apocalyptic number.

It is an amenable number.

26255689 is a deficient number, since it is larger than the sum of its proper divisors (1).

26255689 is an equidigital number, since it uses as much as digits as its factorization.

26255689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 43.

The square root of 26255689 is about 5124.0305424539. The cubic root of 26255689 is about 297.2175659108.

The spelling of 26255689 in words is "twenty-six million, two hundred fifty-five thousand, six hundred eighty-nine".