27398689 has 2 divisors, whose sum is σ = 27398690. Its totient is φ = 27398688.

The previous prime is 27398677. The next prime is 27398719. The reversal of 27398689 is 98689372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27384289 + 14400 = 5233^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 27398689 - 2¹¹ = 27396641 is a prime.

It is not a weakly prime, because it can be changed into another prime (27398629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13699344 + 13699345.

It is an arithmetic number, because the mean of its divisors is an integer number (13699345).

Almost surely, 2^27398689 is an apocalyptic number.

It is an amenable number.

27398689 is a deficient number, since it is larger than the sum of its proper divisors (1).

27398689 is an equidigital number, since it uses as much as digits as its factorization.

27398689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 52.

The square root of 27398689 is about 5234.3757029850. The cubic root of 27398689 is about 301.4694168884.

The spelling of 27398689 in words is "twenty-seven million, three hundred ninety-eight thousand, six hundred eighty-nine".