27806749 has 2 divisors, whose sum is σ = 27806750. Its totient is φ = 27806748.

The previous prime is 27806719. The next prime is 27806773. The reversal of 27806749 is 94760872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26163225 + 1643524 = 5115^2 + 1282^2 .

It is a cyclic number.

It is not a de Polignac number, because 27806749 - 2⁵ = 27806717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27806719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13903374 + 13903375.

It is an arithmetic number, because the mean of its divisors is an integer number (13903375).

Almost surely, 2^27806749 is an apocalyptic number.

It is an amenable number.

27806749 is a deficient number, since it is larger than the sum of its proper divisors (1).

27806749 is an equidigital number, since it uses as much as digits as its factorization.

27806749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 27806749 is about 5273.2105021514. The cubic root of 27806749 is about 302.9586839649.

The spelling of 27806749 in words is "twenty-seven million, eight hundred six thousand, seven hundred forty-nine".