27284321 has 2 divisors, whose sum is σ = 27284322. Its totient is φ = 27284320.

The previous prime is 27284297. The next prime is 27284329. The reversal of 27284321 is 12348272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16321600 + 10962721 = 4040^2 + 3311^2 .

It is a cyclic number.

It is not a de Polignac number, because 27284321 - 2¹⁴ = 27267937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (27284329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13642160 + 13642161.

It is an arithmetic number, because the mean of its divisors is an integer number (13642161).

Almost surely, 2^27284321 is an apocalyptic number.

It is an amenable number.

27284321 is a deficient number, since it is larger than the sum of its proper divisors (1).

27284321 is an equidigital number, since it uses as much as digits as its factorization.

27284321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 29.

The square root of 27284321 is about 5223.4395756053. The cubic root of 27284321 is about 301.0493658984.

The spelling of 27284321 in words is "twenty-seven million, two hundred eighty-four thousand, three hundred twenty-one".