27378149 has 2 divisors, whose sum is σ = 27378150. Its totient is φ = 27378148.

The previous prime is 27378137. The next prime is 27378151. The reversal of 27378149 is 94187372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17581249 + 9796900 = 4193^2 + 3130^2 .

It is a cyclic number.

It is not a de Polignac number, because 27378149 - 2⁴ = 27378133 is a prime.

Together with 27378151, 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 (27378179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13689074 + 13689075.

It is an arithmetic number, because the mean of its divisors is an integer number (13689075).

Almost surely, 2^27378149 is an apocalyptic number.

It is an amenable number.

27378149 is a deficient number, since it is larger than the sum of its proper divisors (1).

27378149 is an equidigital number, since it uses as much as digits as its factorization.

27378149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 27378149 is about 5232.4133055408. The cubic root of 27378149 is about 301.3940637716.

The spelling of 27378149 in words is "twenty-seven million, three hundred seventy-eight thousand, one hundred forty-nine".