27786061 has 2 divisors, whose sum is σ = 27786062. Its totient is φ = 27786060.

The previous prime is 27785983. The next prime is 27786079. The reversal of 27786061 is 16068772.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20196036 + 7590025 = 4494^2 + 2755^2 .

It is a cyclic number.

It is not a de Polignac number, because 27786061 - 2¹⁷ = 27654989 is a prime.

It is equal to p_1728982 and since 27786061 and 1728982 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27786061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27786091) 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, 13893030 + 13893031.

It is an arithmetic number, because the mean of its divisors is an integer number (13893031).

Almost surely, 2^27786061 is an apocalyptic number.

It is an amenable number.

27786061 is a deficient number, since it is larger than the sum of its proper divisors (1).

27786061 is an equidigital number, since it uses as much as digits as its factorization.

27786061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 27786061 is about 5271.2485238319. The cubic root of 27786061 is about 302.8835323743.

The spelling of 27786061 in words is "twenty-seven million, seven hundred eighty-six thousand, sixty-one".