27742387 has 2 divisors, whose sum is σ = 27742388. Its totient is φ = 27742386.

The previous prime is 27742369. The next prime is 27742397. The reversal of 27742387 is 78324772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27742387 - 2⁷ = 27742259 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27742367) 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, 13871193 + 13871194.

It is an arithmetic number, because the mean of its divisors is an integer number (13871194).

Almost surely, 2^27742387 is an apocalyptic number.

27742387 is a deficient number, since it is larger than the sum of its proper divisors (1).

27742387 is an equidigital number, since it uses as much as digits as its factorization.

27742387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131712, while the sum is 40.

The square root of 27742387 is about 5267.1042328779. The cubic root of 27742387 is about 302.7247588548.

The spelling of 27742387 in words is "twenty-seven million, seven hundred forty-two thousand, three hundred eighty-seven".