27887999 has 2 divisors, whose sum is σ = 27888000. Its totient is φ = 27887998.

The previous prime is 27887947. The next prime is 27888001. The reversal of 27887999 is 99978872.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27887999 is a prime.

Together with 27888001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27884999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13943999 + 13944000.

It is an arithmetic number, because the mean of its divisors is an integer number (13944000).

Almost surely, 2^27887999 is an apocalyptic number.

27887999 is a deficient number, since it is larger than the sum of its proper divisors (1).

27887999 is an equidigital number, since it uses as much as digits as its factorization.

27887999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4572288, while the sum is 59.

The square root of 27887999 is about 5280.9089179799. The cubic root of 27887999 is about 303.2534739924.

The spelling of 27887999 in words is "twenty-seven million, eight hundred eighty-seven thousand, nine hundred ninety-nine".