27663257 has 2 divisors, whose sum is σ = 27663258. Its totient is φ = 27663256.

The previous prime is 27663241. The next prime is 27663263. The reversal of 27663257 is 75236672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20106256 + 7557001 = 4484^2 + 2749^2 .

It is a cyclic number.

It is not a de Polignac number, because 27663257 - 2⁴ = 27663241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27663257.

It is not a weakly prime, because it can be changed into another prime (27663217) 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, 13831628 + 13831629.

It is an arithmetic number, because the mean of its divisors is an integer number (13831629).

Almost surely, 2^27663257 is an apocalyptic number.

It is an amenable number.

27663257 is a deficient number, since it is larger than the sum of its proper divisors (1).

27663257 is an equidigital number, since it uses as much as digits as its factorization.

27663257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 38.

The square root of 27663257 is about 5259.5871510985. The cubic root of 27663257 is about 302.4366627406.

The spelling of 27663257 in words is "twenty-seven million, six hundred sixty-three thousand, two hundred fifty-seven".