27938641 has 2 divisors, whose sum is σ = 27938642. Its totient is φ = 27938640.

The previous prime is 27938639. The next prime is 27938653. The reversal of 27938641 is 14683972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17048641 + 10890000 = 4129^2 + 3300^2 .

It is a cyclic number.

It is not a de Polignac number, because 27938641 - 2¹ = 27938639 is a prime.

Together with 27938639, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27938594 and 27938603.

It is not a weakly prime, because it can be changed into another prime (27938611) 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, 13969320 + 13969321.

It is an arithmetic number, because the mean of its divisors is an integer number (13969321).

Almost surely, 2^27938641 is an apocalyptic number.

It is an amenable number.

27938641 is a deficient number, since it is larger than the sum of its proper divisors (1).

27938641 is an equidigital number, since it uses as much as digits as its factorization.

27938641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 27938641 is about 5285.7015617607. The cubic root of 27938641 is about 303.4369229849.

The spelling of 27938641 in words is "twenty-seven million, nine hundred thirty-eight thousand, six hundred forty-one".