641222347 has 2 divisors, whose sum is σ = 641222348. Its totient is φ = 641222346.

The previous prime is 641222311. The next prime is 641222353. The reversal of 641222347 is 743222146.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641222347 - 2¹¹ = 641220299 is a prime.

It is a super-2 number, since 2×641222347² = 822332196584376818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641222357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320611173 + 320611174.

It is an arithmetic number, because the mean of its divisors is an integer number (320611174).

Almost surely, 2^641222347 is an apocalyptic number.

641222347 is a deficient number, since it is larger than the sum of its proper divisors (1).

641222347 is an equidigital number, since it uses as much as digits as its factorization.

641222347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 31.

The square root of 641222347 is about 25322.3685108641. The cubic root of 641222347 is about 862.3221660104.

The spelling of 641222347 in words is "six hundred forty-one million, two hundred twenty-two thousand, three hundred forty-seven".