27639013 has 2 divisors, whose sum is σ = 27639014. Its totient is φ = 27639012.

The previous prime is 27638987. The next prime is 27639047. The reversal of 27639013 is 31093672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21095649 + 6543364 = 4593^2 + 2558^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27639013 is a prime.

It is a super-2 number, since 2×27639013² = 1527830079228338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27639413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13819506 + 13819507.

It is an arithmetic number, because the mean of its divisors is an integer number (13819507).

Almost surely, 2^27639013 is an apocalyptic number.

It is an amenable number.

27639013 is a deficient number, since it is larger than the sum of its proper divisors (1).

27639013 is an equidigital number, since it uses as much as digits as its factorization.

27639013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 27639013 is about 5257.2819022761. The cubic root of 27639013 is about 302.3482853731.

The spelling of 27639013 in words is "twenty-seven million, six hundred thirty-nine thousand, thirteen".