27982543 has 2 divisors, whose sum is σ = 27982544. Its totient is φ = 27982542.

The previous prime is 27982523. The next prime is 27982571. The reversal of 27982543 is 34528972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27982543 - 2¹³ = 27974351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27982496 and 27982505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27982523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13991271 + 13991272.

It is an arithmetic number, because the mean of its divisors is an integer number (13991272).

Almost surely, 2^27982543 is an apocalyptic number.

27982543 is a deficient number, since it is larger than the sum of its proper divisors (1).

27982543 is an equidigital number, since it uses as much as digits as its factorization.

27982543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 27982543 is about 5289.8528334917. The cubic root of 27982543 is about 303.5957772423.

The spelling of 27982543 in words is "twenty-seven million, nine hundred eighty-two thousand, five hundred forty-three".