27398249 has 2 divisors, whose sum is σ = 27398250. Its totient is φ = 27398248.

The previous prime is 27398233. The next prime is 27398251. The reversal of 27398249 is 94289372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 7327849 = 4480^2 + 2707^2 .

It is a cyclic number.

It is not a de Polignac number, because 27398249 - 2⁴ = 27398233 is a prime.

Together with 27398251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27398279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13699124 + 13699125.

It is an arithmetic number, because the mean of its divisors is an integer number (13699125).

Almost surely, 2^27398249 is an apocalyptic number.

It is an amenable number.

27398249 is a deficient number, since it is larger than the sum of its proper divisors (1).

27398249 is an equidigital number, since it uses as much as digits as its factorization.

27398249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 27398249 is about 5234.3336729712. Note that the first 3 decimals coincide. The cubic root of 27398249 is about 301.4678030976.

The spelling of 27398249 in words is "twenty-seven million, three hundred ninety-eight thousand, two hundred forty-nine".