27540647 has 4 divisors (see below), whose sum is σ = 27567480. Its totient is φ = 27513816.

The previous prime is 27540641. The next prime is 27540649. The reversal of 27540647 is 74604572.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27540647 - 2⁴ = 27540631 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 (27540641) 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, 11813 + ... + 13950.

It is an arithmetic number, because the mean of its divisors is an integer number (6891870).

Almost surely, 2^27540647 is an apocalyptic number.

27540647 is a deficient number, since it is larger than the sum of its proper divisors (26833).

27540647 is a wasteful number, since it uses less digits than its factorization.

27540647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26832.

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 27540647 is about 5247.9183492124. The cubic root of 27540647 is about 301.9891777184.

The spelling of 27540647 in words is "twenty-seven million, five hundred forty thousand, six hundred forty-seven".