646032227 has 2 divisors, whose sum is σ = 646032228. Its totient is φ = 646032226.

The previous prime is 646032223. The next prime is 646032251. The reversal of 646032227 is 722230646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646032227 - 2² = 646032223 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 646032193 and 646032202.

It is not a weakly prime, because it can be changed into another prime (646032223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323016113 + 323016114.

It is an arithmetic number, because the mean of its divisors is an integer number (323016114).

Almost surely, 2^646032227 is an apocalyptic number.

646032227 is a deficient number, since it is larger than the sum of its proper divisors (1).

646032227 is an equidigital number, since it uses as much as digits as its factorization.

646032227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 646032227 is about 25417.1640235491. The cubic root of 646032227 is about 864.4729220160.

The spelling of 646032227 in words is "six hundred forty-six million, thirty-two thousand, two hundred twenty-seven".