27945089 has 2 divisors, whose sum is σ = 27945090. Its totient is φ = 27945088.

The previous prime is 27945077. The next prime is 27945107. The reversal of 27945089 is 98054972.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26863489 + 1081600 = 5183^2 + 1040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27945089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27945389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13972544 + 13972545.

It is an arithmetic number, because the mean of its divisors is an integer number (13972545).

Almost surely, 2^27945089 is an apocalyptic number.

It is an amenable number.

27945089 is a deficient number, since it is larger than the sum of its proper divisors (1).

27945089 is an equidigital number, since it uses as much as digits as its factorization.

27945089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 27945089 is about 5286.3114739864. The cubic root of 27945089 is about 303.4602647403.

The spelling of 27945089 in words is "twenty-seven million, nine hundred forty-five thousand, eighty-nine".