27866387 has 2 divisors, whose sum is σ = 27866388. Its totient is φ = 27866386.

The previous prime is 27866359. The next prime is 27866389. The reversal of 27866387 is 78366872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27866387 - 2⁸ = 27866131 is a prime.

Together with 27866389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27866389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13933193 + 13933194.

It is an arithmetic number, because the mean of its divisors is an integer number (13933194).

Almost surely, 2^27866387 is an apocalyptic number.

27866387 is a deficient number, since it is larger than the sum of its proper divisors (1).

27866387 is an equidigital number, since it uses as much as digits as its factorization.

27866387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 47.

The square root of 27866387 is about 5278.8622827272. The cubic root of 27866387 is about 303.1751176140.

The spelling of 27866387 in words is "twenty-seven million, eight hundred sixty-six thousand, three hundred eighty-seven".