27687967 has 4 divisors (see below), whose sum is σ = 27711936. Its totient is φ = 27664000.

The previous prime is 27687949. The next prime is 27687983. The reversal of 27687967 is 76978672.

It is a happy number.

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 27687967 - 2¹⁹ = 27163679 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 (27687937) 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, 10159 + ... + 12592.

It is an arithmetic number, because the mean of its divisors is an integer number (6927984).

Almost surely, 2^27687967 is an apocalyptic number.

27687967 is a deficient number, since it is larger than the sum of its proper divisors (23969).

27687967 is a wasteful number, since it uses less digits than its factorization.

27687967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23968.

The product of its digits is 1778112, while the sum is 52.

The square root of 27687967 is about 5261.9356704544. The cubic root of 27687967 is about 302.5266857135.

The spelling of 27687967 in words is "twenty-seven million, six hundred eighty-seven thousand, nine hundred sixty-seven".