26988089 has 2 divisors, whose sum is σ = 26988090. Its totient is φ = 26988088.

The previous prime is 26987981. The next prime is 26988097. The reversal of 26988089 is 98088962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26988025 + 64 = 5195^2 + 8^2 .

It is a cyclic number.

It is not a de Polignac number, because 26988089 - 2¹² = 26983993 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (26981089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13494044 + 13494045.

It is an arithmetic number, because the mean of its divisors is an integer number (13494045).

Almost surely, 2^26988089 is an apocalyptic number.

It is an amenable number.

26988089 is a deficient number, since it is larger than the sum of its proper divisors (1).

26988089 is an equidigital number, since it uses as much as digits as its factorization.

26988089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 26988089 is about 5195.0061597654. The cubic root of 26988089 is about 299.9558786965.

The spelling of 26988089 in words is "twenty-six million, nine hundred eighty-eight thousand, eighty-nine".