27986081 has 2 divisors, whose sum is σ = 27986082. Its totient is φ = 27986080.

The previous prime is 27986071. The next prime is 27986099. The reversal of 27986081 is 18068972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25150225 + 2835856 = 5015^2 + 1684^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27986081 is a prime.

It is a super-2 number, since 2×27986081² = 1566441459477122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27986011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13993040 + 13993041.

It is an arithmetic number, because the mean of its divisors is an integer number (13993041).

Almost surely, 2^27986081 is an apocalyptic number.

It is an amenable number.

27986081 is a deficient number, since it is larger than the sum of its proper divisors (1).

27986081 is an equidigital number, since it uses as much as digits as its factorization.

27986081 is an evil number, because the sum of its binary digits is even.

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

The square root of 27986081 is about 5290.1872367620. The cubic root of 27986081 is about 303.6085718454.

The spelling of 27986081 in words is "twenty-seven million, nine hundred eighty-six thousand, eighty-one".