27646081 has 2 divisors, whose sum is σ = 27646082. Its totient is φ = 27646080.

The previous prime is 27646027. The next prime is 27646093. The reversal of 27646081 is 18064672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26471025 + 1175056 = 5145^2 + 1084^2 .

It is a cyclic number.

It is not a de Polignac number, because 27646081 - 2⁷ = 27645953 is a prime.

It is a super-2 number, since 2×27646081² = 1528611589317122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27646001) 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, 13823040 + 13823041.

It is an arithmetic number, because the mean of its divisors is an integer number (13823041).

Almost surely, 2^27646081 is an apocalyptic number.

It is an amenable number.

27646081 is a deficient number, since it is larger than the sum of its proper divisors (1).

27646081 is an equidigital number, since it uses as much as digits as its factorization.

27646081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 27646081 is about 5257.9540697880. The cubic root of 27646081 is about 302.3740558971.

The spelling of 27646081 in words is "twenty-seven million, six hundred forty-six thousand, eighty-one".