27938149 has 2 divisors, whose sum is σ = 27938150. Its totient is φ = 27938148.

The previous prime is 27938111. The next prime is 27938153. The reversal of 27938149 is 94183972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24900100 + 3038049 = 4990^2 + 1743^2 .

It is a cyclic number.

It is not a de Polignac number, because 27938149 - 2¹¹ = 27936101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27938159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13969074 + 13969075.

It is an arithmetic number, because the mean of its divisors is an integer number (13969075).

Almost surely, 2^27938149 is an apocalyptic number.

It is an amenable number.

27938149 is a deficient number, since it is larger than the sum of its proper divisors (1).

27938149 is an equidigital number, since it uses as much as digits as its factorization.

27938149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 27938149 is about 5285.6550209033. The cubic root of 27938149 is about 303.4351417977.

The spelling of 27938149 in words is "twenty-seven million, nine hundred thirty-eight thousand, one hundred forty-nine".