636320227 has 2 divisors, whose sum is σ = 636320228. Its totient is φ = 636320226.

The previous prime is 636320221. The next prime is 636320249. The reversal of 636320227 is 722023636.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-636320227 is a prime.

It is a super-3 number, since 3×636320227³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (636320221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318160113 + 318160114.

It is an arithmetic number, because the mean of its divisors is an integer number (318160114).

Almost surely, 2^636320227 is an apocalyptic number.

636320227 is a deficient number, since it is larger than the sum of its proper divisors (1).

636320227 is an equidigital number, since it uses as much as digits as its factorization.

636320227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 31.

The square root of 636320227 is about 25225.3885401197. The cubic root of 636320227 is about 860.1190690556.

The spelling of 636320227 in words is "six hundred thirty-six million, three hundred twenty thousand, two hundred twenty-seven".