27681011 has 2 divisors, whose sum is σ = 27681012. Its totient is φ = 27681010.

The previous prime is 27681001. The next prime is 27681037. The reversal of 27681011 is 11018672.

It is an a-pointer prime, because the next prime (27681037) can be obtained adding 27681011 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27681011 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27681001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13840505 + 13840506.

It is an arithmetic number, because the mean of its divisors is an integer number (13840506).

Almost surely, 2^27681011 is an apocalyptic number.

27681011 is a deficient number, since it is larger than the sum of its proper divisors (1).

27681011 is an equidigital number, since it uses as much as digits as its factorization.

27681011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 27681011 is about 5261.2746554423. The cubic root of 27681011 is about 302.5013491732.

Adding to 27681011 its reverse (11018672), we get a palindrome (38699683).

The spelling of 27681011 in words is "twenty-seven million, six hundred eighty-one thousand, eleven".