27806693 has 2 divisors, whose sum is σ = 27806694. Its totient is φ = 27806692.

The previous prime is 27806687. The next prime is 27806707. The reversal of 27806693 is 39660872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17833729 + 9972964 = 4223^2 + 3158^2 .

It is a cyclic number.

It is not a de Polignac number, because 27806693 - 2⁴ = 27806677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27806693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27806393) 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, 13903346 + 13903347.

It is an arithmetic number, because the mean of its divisors is an integer number (13903347).

Almost surely, 2^27806693 is an apocalyptic number.

It is an amenable number.

27806693 is a deficient number, since it is larger than the sum of its proper divisors (1).

27806693 is an equidigital number, since it uses as much as digits as its factorization.

27806693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 27806693 is about 5273.2051922905. The cubic root of 27806693 is about 302.9584805886.

The spelling of 27806693 in words is "twenty-seven million, eight hundred six thousand, six hundred ninety-three".