27870281 has 2 divisors, whose sum is σ = 27870282. Its totient is φ = 27870280.

The previous prime is 27870253. The next prime is 27870289. The reversal of 27870281 is 18207872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18966025 + 8904256 = 4355^2 + 2984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27870281 is a prime.

It is a super-2 number, since 2×27870281² = 1553505126037922, which contains 22 as substring.

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 (27870289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13935140 + 13935141.

It is an arithmetic number, because the mean of its divisors is an integer number (13935141).

Almost surely, 2^27870281 is an apocalyptic number.

It is an amenable number.

27870281 is a deficient number, since it is larger than the sum of its proper divisors (1).

27870281 is an equidigital number, since it uses as much as digits as its factorization.

27870281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 27870281 is about 5279.2310993174. The cubic root of 27870281 is about 303.1892386758.

The spelling of 27870281 in words is "twenty-seven million, eight hundred seventy thousand, two hundred eighty-one".