27986143 has 2 divisors, whose sum is σ = 27986144. Its totient is φ = 27986142.

The previous prime is 27986137. The next prime is 27986159. The reversal of 27986143 is 34168972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27986143 - 2⁵ = 27986111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27986096 and 27986105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27987143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13993071 + 13993072.

It is an arithmetic number, because the mean of its divisors is an integer number (13993072).

Almost surely, 2^27986143 is an apocalyptic number.

27986143 is a deficient number, since it is larger than the sum of its proper divisors (1).

27986143 is an equidigital number, since it uses as much as digits as its factorization.

27986143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 27986143 is about 5290.1930966648. The cubic root of 27986143 is about 303.6087960487.

The spelling of 27986143 in words is "twenty-seven million, nine hundred eighty-six thousand, one hundred forty-three".