27656137 has 2 divisors, whose sum is σ = 27656138. Its totient is φ = 27656136.

The previous prime is 27656129. The next prime is 27656149. The reversal of 27656137 is 73165672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26998416 + 657721 = 5196^2 + 811^2 .

It is a cyclic number.

It is not a de Polignac number, because 27656137 - 2³ = 27656129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27656096 and 27656105.

It is not a weakly prime, because it can be changed into another prime (27656107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13828068 + 13828069.

It is an arithmetic number, because the mean of its divisors is an integer number (13828069).

Almost surely, 2^27656137 is an apocalyptic number.

It is an amenable number.

27656137 is a deficient number, since it is larger than the sum of its proper divisors (1).

27656137 is an equidigital number, since it uses as much as digits as its factorization.

27656137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 37.

The square root of 27656137 is about 5258.9102483309. The cubic root of 27656137 is about 302.4107133521.

The spelling of 27656137 in words is "twenty-seven million, six hundred fifty-six thousand, one hundred thirty-seven".