27860891 has 2 divisors, whose sum is σ = 27860892. Its totient is φ = 27860890.

The previous prime is 27860887. The next prime is 27860927. The reversal of 27860891 is 19806872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27860891 - 2² = 27860887 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27860831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13930445 + 13930446.

It is an arithmetic number, because the mean of its divisors is an integer number (13930446).

Almost surely, 2^27860891 is an apocalyptic number.

27860891 is a deficient number, since it is larger than the sum of its proper divisors (1).

27860891 is an equidigital number, since it uses as much as digits as its factorization.

27860891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 27860891 is about 5278.3416903418. The cubic root of 27860891 is about 303.1551848781.

The spelling of 27860891 in words is "twenty-seven million, eight hundred sixty thousand, eight hundred ninety-one".