27398197 has 2 divisors, whose sum is σ = 27398198. Its totient is φ = 27398196.

The previous prime is 27398179. The next prime is 27398207. The reversal of 27398197 is 79189372.

It is a happy number.

Together with previous prime (27398179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16048036 + 11350161 = 4006^2 + 3369^2 .

It is a cyclic number.

It is not a de Polignac number, because 27398197 - 2²³ = 19009589 is a prime.

It is a super-2 number, since 2×27398197² = 1501322397701618, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27398897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13699098 + 13699099.

It is an arithmetic number, because the mean of its divisors is an integer number (13699099).

Almost surely, 2^27398197 is an apocalyptic number.

It is an amenable number.

27398197 is a deficient number, since it is larger than the sum of its proper divisors (1).

27398197 is an equidigital number, since it uses as much as digits as its factorization.

27398197 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 27398197 is about 5234.3287057654. The cubic root of 27398197 is about 301.4676123758.

The spelling of 27398197 in words is "twenty-seven million, three hundred ninety-eight thousand, one hundred ninety-seven".