27090209 has 4 divisors (see below), whose sum is σ = 27106560. Its totient is φ = 27073860.

The previous prime is 27090191. The next prime is 27090221. The reversal of 27090209 is 90209072.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27090209 - 2¹² = 27086113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27090229) 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 3 ways as a sum of consecutive naturals, for example, 5369 + ... + 9110.

It is an arithmetic number, because the mean of its divisors is an integer number (6776640).

Almost surely, 2^27090209 is an apocalyptic number.

It is an amenable number.

27090209 is a deficient number, since it is larger than the sum of its proper divisors (16351).

27090209 is a wasteful number, since it uses less digits than its factorization.

27090209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16350.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 27090209 is about 5204.8255494301. The cubic root of 27090209 is about 300.3337360040. Note that the first 3 decimals are identical.

The spelling of 27090209 in words is "twenty-seven million, ninety thousand, two hundred nine".