27887491 has 2 divisors, whose sum is σ = 27887492. Its totient is φ = 27887490.

The previous prime is 27887443. The next prime is 27887501. The reversal of 27887491 is 19478872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27887491 - 2¹⁷ = 27756419 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27387491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13943745 + 13943746.

It is an arithmetic number, because the mean of its divisors is an integer number (13943746).

Almost surely, 2^27887491 is an apocalyptic number.

27887491 is a deficient number, since it is larger than the sum of its proper divisors (1).

27887491 is an equidigital number, since it uses as much as digits as its factorization.

27887491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 46.

The square root of 27887491 is about 5280.8608199800. The cubic root of 27887491 is about 303.2516326544.

The spelling of 27887491 in words is "twenty-seven million, eight hundred eighty-seven thousand, four hundred ninety-one".