27398897 has 2 divisors, whose sum is σ = 27398898. Its totient is φ = 27398896.

The previous prime is 27398887. The next prime is 27398923. The reversal of 27398897 is 79889372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24216241 + 3182656 = 4921^2 + 1784^2 .

It is a cyclic number.

It is not a de Polignac number, because 27398897 - 2²² = 23204593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27398837) 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, 13699448 + 13699449.

It is an arithmetic number, because the mean of its divisors is an integer number (13699449).

Almost surely, 2^27398897 is an apocalyptic number.

It is an amenable number.

27398897 is a deficient number, since it is larger than the sum of its proper divisors (1).

27398897 is an equidigital number, since it uses as much as digits as its factorization.

27398897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 53.

The square root of 27398897 is about 5234.3955716014. The cubic root of 27398897 is about 301.4701797653.

The spelling of 27398897 in words is "twenty-seven million, three hundred ninety-eight thousand, eight hundred ninety-seven".