27189397 has 2 divisors, whose sum is σ = 27189398. Its totient is φ = 27189396.

The previous prime is 27189377. The next prime is 27189403. The reversal of 27189397 is 79398172.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26563716 + 625681 = 5154^2 + 791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27189397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27189367) 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, 13594698 + 13594699.

It is an arithmetic number, because the mean of its divisors is an integer number (13594699).

Almost surely, 2^27189397 is an apocalyptic number.

It is an amenable number.

27189397 is a deficient number, since it is larger than the sum of its proper divisors (1).

27189397 is an equidigital number, since it uses as much as digits as its factorization.

27189397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 46.

The square root of 27189397 is about 5214.3453088571. The cubic root of 27189397 is about 300.6998365303.

The spelling of 27189397 in words is "twenty-seven million, one hundred eighty-nine thousand, three hundred ninety-seven".