26845549 has 2 divisors, whose sum is σ = 26845550. Its totient is φ = 26845548.

The previous prime is 26845547. The next prime is 26845571. The reversal of 26845549 is 94554862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15856324 + 10989225 = 3982^2 + 3315^2 .

It is a cyclic number.

It is not a de Polignac number, because 26845549 - 2¹ = 26845547 is a prime.

It is a super-2 number, since 2×26845549² = 1441367002222802, which contains 22 as substring.

Together with 26845547, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26845541) 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, 13422774 + 13422775.

It is an arithmetic number, because the mean of its divisors is an integer number (13422775).

Almost surely, 2^26845549 is an apocalyptic number.

It is an amenable number.

26845549 is a deficient number, since it is larger than the sum of its proper divisors (1).

26845549 is an equidigital number, since it uses as much as digits as its factorization.

26845549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 43.

The square root of 26845549 is about 5181.2690530410. The cubic root of 26845549 is about 299.4268650108.

The spelling of 26845549 in words is "twenty-six million, eight hundred forty-five thousand, five hundred forty-nine".