27355681 has 2 divisors, whose sum is σ = 27355682. Its totient is φ = 27355680.

The previous prime is 27355639. The next prime is 27355711. The reversal of 27355681 is 18655372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23435281 + 3920400 = 4841^2 + 1980^2 .

It is a cyclic number.

It is not a de Polignac number, because 27355681 - 2⁹ = 27355169 is a prime.

It is a super-2 number, since 2×27355681² = 1496666565947522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27355681.

It is not a weakly prime, because it can be changed into another prime (27355481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13677840 + 13677841.

It is an arithmetic number, because the mean of its divisors is an integer number (13677841).

Almost surely, 2^27355681 is an apocalyptic number.

It is an amenable number.

27355681 is a deficient number, since it is larger than the sum of its proper divisors (1).

27355681 is an equidigital number, since it uses as much as digits as its factorization.

27355681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 27355681 is about 5230.2658632234. The cubic root of 27355681 is about 301.3115944140.

The spelling of 27355681 in words is "twenty-seven million, three hundred fifty-five thousand, six hundred eighty-one".