646232227 has 2 divisors, whose sum is σ = 646232228. Its totient is φ = 646232226.

The previous prime is 646232177. The next prime is 646232263. The reversal of 646232227 is 722232646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 646232227 - 2⁷ = 646232099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646232192 and 646232201.

It is not a weakly prime, because it can be changed into another prime (646232297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323116113 + 323116114.

It is an arithmetic number, because the mean of its divisors is an integer number (323116114).

Almost surely, 2^646232227 is an apocalyptic number.

646232227 is a deficient number, since it is larger than the sum of its proper divisors (1).

646232227 is an equidigital number, since it uses as much as digits as its factorization.

646232227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 34.

The square root of 646232227 is about 25421.0980683369. The cubic root of 646232227 is about 864.5621212534.

The spelling of 646232227 in words is "six hundred forty-six million, two hundred thirty-two thousand, two hundred twenty-seven".