27655213 has 2 divisors, whose sum is σ = 27655214. Its totient is φ = 27655212.

The previous prime is 27655211. The next prime is 27655219. The reversal of 27655213 is 31255672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27646564 + 8649 = 5258^2 + 93^2 .

It is a cyclic number.

It is not a de Polignac number, because 27655213 - 2¹ = 27655211 is a prime.

Together with 27655211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27655211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13827606 + 13827607.

It is an arithmetic number, because the mean of its divisors is an integer number (13827607).

Almost surely, 2^27655213 is an apocalyptic number.

It is an amenable number.

27655213 is a deficient number, since it is larger than the sum of its proper divisors (1).

27655213 is an equidigital number, since it uses as much as digits as its factorization.

27655213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 31.

The square root of 27655213 is about 5258.8223966968. The cubic root of 27655213 is about 302.4073454364.

The spelling of 27655213 in words is "twenty-seven million, six hundred fifty-five thousand, two hundred thirteen".