27687047 has 4 divisors (see below), whose sum is σ = 29144280. Its totient is φ = 26229816.

The previous prime is 27687019. The next prime is 27687053. The reversal of 27687047 is 74078672.

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 27687047 - 2¹² = 27682951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27686995 and 27687013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27687347) 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, 728588 + ... + 728625.

It is an arithmetic number, because the mean of its divisors is an integer number (7286070).

Almost surely, 2^27687047 is an apocalyptic number.

27687047 is a deficient number, since it is larger than the sum of its proper divisors (1457233).

27687047 is a wasteful number, since it uses less digits than its factorization.

27687047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457232.

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 27687047 is about 5261.8482494272. The cubic root of 27687047 is about 302.5233349483.

The spelling of 27687047 in words is "twenty-seven million, six hundred eighty-seven thousand, forty-seven".