646260227 has 2 divisors, whose sum is σ = 646260228. Its totient is φ = 646260226.

The previous prime is 646260203. The next prime is 646260229. The reversal of 646260227 is 722062646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 646260227 - 2¹⁶ = 646194691 is a prime.

Together with 646260229, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (646260229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323130113 + 323130114.

It is an arithmetic number, because the mean of its divisors is an integer number (323130114).

Almost surely, 2^646260227 is an apocalyptic number.

646260227 is a deficient number, since it is larger than the sum of its proper divisors (1).

646260227 is an equidigital number, since it uses as much as digits as its factorization.

646260227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 646260227 is about 25421.6487860249. The cubic root of 646260227 is about 864.5746076779.

The spelling of 646260227 in words is "six hundred forty-six million, two hundred sixty thousand, two hundred twenty-seven".