27942517 has 2 divisors, whose sum is σ = 27942518. Its totient is φ = 27942516.

The previous prime is 27942491. The next prime is 27942553. The reversal of 27942517 is 71524972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14333796 + 13608721 = 3786^2 + 3689^2 .

It is a cyclic number.

It is not a de Polignac number, because 27942517 - 2²³ = 19553909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27942557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13971258 + 13971259.

It is an arithmetic number, because the mean of its divisors is an integer number (13971259).

Almost surely, 2^27942517 is an apocalyptic number.

It is an amenable number.

27942517 is a deficient number, since it is larger than the sum of its proper divisors (1).

27942517 is an equidigital number, since it uses as much as digits as its factorization.

27942517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 37.

The square root of 27942517 is about 5286.0681985763. The cubic root of 27942517 is about 303.4509545326.

The spelling of 27942517 in words is "twenty-seven million, nine hundred forty-two thousand, five hundred seventeen".