26549489 has 2 divisors, whose sum is σ = 26549490. Its totient is φ = 26549488.

The previous prime is 26549473. The next prime is 26549491. The reversal of 26549489 is 98494562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23280625 + 3268864 = 4825^2 + 1808^2 .

It is a cyclic number.

It is not a de Polignac number, because 26549489 - 2⁴ = 26549473 is a prime.

It is a super-2 number, since 2×26549489² = 1409750732322242, which contains 22 as substring.

Together with 26549491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26549389) 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, 13274744 + 13274745.

It is an arithmetic number, because the mean of its divisors is an integer number (13274745).

Almost surely, 2^26549489 is an apocalyptic number.

It is an amenable number.

26549489 is a deficient number, since it is larger than the sum of its proper divisors (1).

26549489 is an equidigital number, since it uses as much as digits as its factorization.

26549489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 47.

The square root of 26549489 is about 5152.6196250063. The cubic root of 26549489 is about 298.3220734457.

The spelling of 26549489 in words is "twenty-six million, five hundred forty-nine thousand, four hundred eighty-nine".