27685109 has 4 divisors (see below), whose sum is σ = 29142240. Its totient is φ = 26227980.

The previous prime is 27685103. The next prime is 27685117. The reversal of 27685109 is 90158672.

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 not a de Polignac number, because 27685109 - 2²⁴ = 10907893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27685103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 728537 + ... + 728574.

It is an arithmetic number, because the mean of its divisors is an integer number (7285560).

Almost surely, 2^27685109 is an apocalyptic number.

It is an amenable number.

27685109 is a deficient number, since it is larger than the sum of its proper divisors (1457131).

27685109 is a wasteful number, since it uses less digits than its factorization.

27685109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457130.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 27685109 is about 5261.6640903805. The cubic root of 27685109 is about 302.5162762456.

The spelling of 27685109 in words is "twenty-seven million, six hundred eighty-five thousand, one hundred nine".