27249191 has 2 divisors, whose sum is σ = 27249192. Its totient is φ = 27249190.

The previous prime is 27249151. The next prime is 27249193. The reversal of 27249191 is 19194272.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27249191 - 2²² = 23054887 is a prime.

Together with 27249193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27249193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13624595 + 13624596.

It is an arithmetic number, because the mean of its divisors is an integer number (13624596).

Almost surely, 2^27249191 is an apocalyptic number.

27249191 is a deficient number, since it is larger than the sum of its proper divisors (1).

27249191 is an equidigital number, since it uses as much as digits as its factorization.

27249191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 27249191 is about 5220.0757657337. The cubic root of 27249191 is about 300.9201047687.

The spelling of 27249191 in words is "twenty-seven million, two hundred forty-nine thousand, one hundred ninety-one".