27540047 has 4 divisors (see below), whose sum is σ = 27615456. Its totient is φ = 27464640.

The previous prime is 27540041. The next prime is 27540067. The reversal of 27540047 is 74004572.

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 27540047 - 2¹⁸ = 27277903 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 (27540041) 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, 37154 + ... + 37887.

It is an arithmetic number, because the mean of its divisors is an integer number (6903864).

Almost surely, 2^27540047 is an apocalyptic number.

27540047 is a deficient number, since it is larger than the sum of its proper divisors (75409).

27540047 is an equidigital number, since it uses as much as digits as its factorization.

27540047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75408.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 27540047 is about 5247.8611833775. The cubic root of 27540047 is about 301.9869846590.

The spelling of 27540047 in words is "twenty-seven million, five hundred forty thousand, forty-seven".