27782057 has 2 divisors, whose sum is σ = 27782058. Its totient is φ = 27782056.

The previous prime is 27782039. The next prime is 27782059. The reversal of 27782057 is 75028772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27709696 + 72361 = 5264^2 + 269^2 .

It is a cyclic number.

It is not a de Polignac number, because 27782057 - 2⁶ = 27781993 is a prime.

Together with 27782059, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27782057.

It is not a weakly prime, because it can be changed into another prime (27782059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13891028 + 13891029.

It is an arithmetic number, because the mean of its divisors is an integer number (13891029).

Almost surely, 2^27782057 is an apocalyptic number.

It is an amenable number.

27782057 is a deficient number, since it is larger than the sum of its proper divisors (1).

27782057 is an equidigital number, since it uses as much as digits as its factorization.

27782057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 27782057 is about 5270.8687139787. The cubic root of 27782057 is about 302.8689830658.

The spelling of 27782057 in words is "twenty-seven million, seven hundred eighty-two thousand, fifty-seven".