27783361 has 2 divisors, whose sum is σ = 27783362. Its totient is φ = 27783360.

The previous prime is 27783331. The next prime is 27783373. The reversal of 27783361 is 16338772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26584336 + 1199025 = 5156^2 + 1095^2 .

It is a cyclic number.

It is not a de Polignac number, because 27783361 - 2⁹ = 27782849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27783361.

It is not a weakly prime, because it can be changed into another prime (27783311) 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, 13891680 + 13891681.

It is an arithmetic number, because the mean of its divisors is an integer number (13891681).

Almost surely, 2^27783361 is an apocalyptic number.

It is an amenable number.

27783361 is a deficient number, since it is larger than the sum of its proper divisors (1).

27783361 is an equidigital number, since it uses as much as digits as its factorization.

27783361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 37.

The square root of 27783361 is about 5270.9924113017. The cubic root of 27783361 is about 302.8737215555.

It can be divided in two parts, 277 and 83361, that added together give a palindrome (83638).

The spelling of 27783361 in words is "twenty-seven million, seven hundred eighty-three thousand, three hundred sixty-one".