27805849 has 2 divisors, whose sum is σ = 27805850. Its totient is φ = 27805848.

The previous prime is 27805847. The next prime is 27805859. The reversal of 27805849 is 94850872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19740249 + 8065600 = 4443^2 + 2840^2 .

It is a cyclic number.

It is not a de Polignac number, because 27805849 - 2¹ = 27805847 is a prime.

It is a super-2 number, since 2×27805849² = 1546330477221602, which contains 22 as substring.

Together with 27805847, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (27805847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13902924 + 13902925.

It is an arithmetic number, because the mean of its divisors is an integer number (13902925).

Almost surely, 2^27805849 is an apocalyptic number.

It is an amenable number.

27805849 is a deficient number, since it is larger than the sum of its proper divisors (1).

27805849 is an equidigital number, since it uses as much as digits as its factorization.

27805849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 27805849 is about 5273.1251644542. The cubic root of 27805849 is about 302.9554153848.

The spelling of 27805849 in words is "twenty-seven million, eight hundred five thousand, eight hundred forty-nine".