641394227 has 2 divisors, whose sum is σ = 641394228. Its totient is φ = 641394226.

The previous prime is 641394217. The next prime is 641394269. The reversal of 641394227 is 722493146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641394227 - 2⁸ = 641393971 is a prime.

It is a super-2 number, since 2×641394227² = 822773108857855058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641394217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320697113 + 320697114.

It is an arithmetic number, because the mean of its divisors is an integer number (320697114).

Almost surely, 2^641394227 is an apocalyptic number.

641394227 is a deficient number, since it is larger than the sum of its proper divisors (1).

641394227 is an equidigital number, since it uses as much as digits as its factorization.

641394227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 641394227 is about 25325.7621208129. The cubic root of 641394227 is about 862.3992077695.

The spelling of 641394227 in words is "six hundred forty-one million, three hundred ninety-four thousand, two hundred twenty-seven".