27684513 has 6 divisors (see below), whose sum is σ = 39988754. Its totient is φ = 18456336.

The previous prime is 27684487. The next prime is 27684521. The reversal of 27684513 is 31548672.

It can be written as a sum of positive squares in only one way, i.e., 24324624 + 3359889 = 4932^2 + 1833^2 .

It is not a de Polignac number, because 27684513 - 2⁸ = 27684257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27684563) 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 in 5 ways as a sum of consecutive naturals, for example, 1538020 + ... + 1538037.

Almost surely, 2^27684513 is an apocalyptic number.

It is an amenable number.

27684513 is a deficient number, since it is larger than the sum of its proper divisors (12304241).

27684513 is a wasteful number, since it uses less digits than its factorization.

27684513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3076063 (or 3076060 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 27684513 is about 5261.6074540011. The cubic root of 27684513 is about 302.5141053915.

The spelling of 27684513 in words is "twenty-seven million, six hundred eighty-four thousand, five hundred thirteen".