27443149 has 2 divisors, whose sum is σ = 27443150. Its totient is φ = 27443148.

The previous prime is 27443147. The next prime is 27443161. The reversal of 27443149 is 94134472.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17489124 + 9954025 = 4182^2 + 3155^2 .

It is a cyclic number.

It is not a de Polignac number, because 27443149 - 2¹ = 27443147 is a prime.

Together with 27443147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27443147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13721574 + 13721575.

It is an arithmetic number, because the mean of its divisors is an integer number (13721575).

Almost surely, 2^27443149 is an apocalyptic number.

It is an amenable number.

27443149 is a deficient number, since it is larger than the sum of its proper divisors (1).

27443149 is an equidigital number, since it uses as much as digits as its factorization.

27443149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 34.

The square root of 27443149 is about 5238.6209063073. The cubic root of 27443149 is about 301.6323941135.

The spelling of 27443149 in words is "twenty-seven million, four hundred forty-three thousand, one hundred forty-nine".