618068281 has 2 divisors, whose sum is σ = 618068282. Its totient is φ = 618068280.

The previous prime is 618068257. The next prime is 618068323. The reversal of 618068281 is 182860816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 589712656 + 28355625 = 24284^2 + 5325^2 .

It is a cyclic number.

It is not a de Polignac number, because 618068281 - 2⁵ = 618068249 is a prime.

It is a super-2 number, since 2×618068281² = 764016799956589922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (618068251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309034140 + 309034141.

It is an arithmetic number, because the mean of its divisors is an integer number (309034141).

Almost surely, 2^618068281 is an apocalyptic number.

It is an amenable number.

618068281 is a deficient number, since it is larger than the sum of its proper divisors (1).

618068281 is an equidigital number, since it uses as much as digits as its factorization.

618068281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 618068281 is about 24860.9790836966. The cubic root of 618068281 is about 851.8153961136.

The spelling of 618068281 in words is "six hundred eighteen million, sixty-eight thousand, two hundred eighty-one".