27910121 has 2 divisors, whose sum is σ = 27910122. Its totient is φ = 27910120.

The previous prime is 27910087. The next prime is 27910153. The reversal of 27910121 is 12101972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26666896 + 1243225 = 5164^2 + 1115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27910121 is a prime.

It is not a weakly prime, because it can be changed into another prime (27910721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13955060 + 13955061.

It is an arithmetic number, because the mean of its divisors is an integer number (13955061).

Almost surely, 2^27910121 is an apocalyptic number.

It is an amenable number.

27910121 is a deficient number, since it is larger than the sum of its proper divisors (1).

27910121 is an equidigital number, since it uses as much as digits as its factorization.

27910121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 27910121 is about 5283.0030285814. The cubic root of 27910121 is about 303.3336375099. Note that the first 3 decimals are identical.

The spelling of 27910121 in words is "twenty-seven million, nine hundred ten thousand, one hundred twenty-one".