27557983 has 2 divisors, whose sum is σ = 27557984. Its totient is φ = 27557982.

The previous prime is 27557963. The next prime is 27557993. The reversal of 27557983 is 38975572.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27557983 - 2⁹ = 27557471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27557903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13778991 + 13778992.

It is an arithmetic number, because the mean of its divisors is an integer number (13778992).

Almost surely, 2^27557983 is an apocalyptic number.

27557983 is a deficient number, since it is larger than the sum of its proper divisors (1).

27557983 is an equidigital number, since it uses as much as digits as its factorization.

27557983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 46.

The square root of 27557983 is about 5249.5697918972. The cubic root of 27557983 is about 302.0525287632.

The spelling of 27557983 in words is "twenty-seven million, five hundred fifty-seven thousand, nine hundred eighty-three".