27450809 has 2 divisors, whose sum is σ = 27450810. Its totient is φ = 27450808.

The previous prime is 27450757. The next prime is 27450811. The reversal of 27450809 is 90805472.

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., 23309584 + 4141225 = 4828^2 + 2035^2 .

It is a cyclic number.

It is not a de Polignac number, because 27450809 - 2¹⁶ = 27385273 is a prime.

Together with 27450811, 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 (27450859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13725404 + 13725405.

It is an arithmetic number, because the mean of its divisors is an integer number (13725405).

Almost surely, 2^27450809 is an apocalyptic number.

It is an amenable number.

27450809 is a deficient number, since it is larger than the sum of its proper divisors (1).

27450809 is an equidigital number, since it uses as much as digits as its factorization.

27450809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 27450809 is about 5239.3519637451. The cubic root of 27450809 is about 301.6604556308.

The spelling of 27450809 in words is "twenty-seven million, four hundred fifty thousand, eight hundred nine".