27887047 has 4 divisors (see below), whose sum is σ = 27899800. Its totient is φ = 27874296.

The previous prime is 27887029. The next prime is 27887053. The reversal of 27887047 is 74078872.

27887047 is nontrivially palindromic in base 5.

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 is a cyclic number.

It is not a de Polignac number, because 27887047 - 2¹¹ = 27884999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27886994 and 27887012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27887077) 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, 2172 + ... + 7777.

It is an arithmetic number, because the mean of its divisors is an integer number (6974950).

Almost surely, 2^27887047 is an apocalyptic number.

27887047 is a deficient number, since it is larger than the sum of its proper divisors (12753).

27887047 is an equidigital number, since it uses as much as digits as its factorization.

27887047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12752.

The product of its (nonzero) digits is 175616, while the sum is 43.

The square root of 27887047 is about 5280.8187812119. The cubic root of 27887047 is about 303.2500232776.

The spelling of 27887047 in words is "twenty-seven million, eight hundred eighty-seven thousand, forty-seven".