27008809 has 3 divisors (see below), whose sum is σ = 27014007. Its totient is φ = 27003612.

The previous prime is 27008803. The next prime is 27008819. The reversal of 27008809 is 90880072.

It is a happy number.

The square root of 27008809 is 5197.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 12355225 + 14653584 = 3515^2 + 3828^2 .

It is not a de Polignac number, because 27008809 - 2⁹ = 27008297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27008803) 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 in 2 ways as a sum of consecutive naturals, for example, 2599 + ... + 7795.

It is an arithmetic number, because the mean of its divisors is an integer number (9004669).

Almost surely, 2^27008809 is an apocalyptic number.

27008809 is the 5197-th square number.

27008809 is the 2599-th centered octagonal number.

It is an amenable number.

27008809 is a deficient number, since it is larger than the sum of its proper divisors (5198).

27008809 is an frugal number, since it uses more digits than its factorization.

27008809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10394 (or 5197 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The cubic root of 27008809 is about 300.0326223784.

The spelling of 27008809 in words is "twenty-seven million, eight thousand, eight hundred nine".