641340311 has 2 divisors, whose sum is σ = 641340312. Its totient is φ = 641340310.

The previous prime is 641340299. The next prime is 641340331. The reversal of 641340311 is 113043146.

641340311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641340311 - 2⁶ = 641340247 is a prime.

It is a super-2 number, since 2×641340311² = 822634789027153442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641340331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320670155 + 320670156.

It is an arithmetic number, because the mean of its divisors is an integer number (320670156).

Almost surely, 2^641340311 is an apocalyptic number.

641340311 is a deficient number, since it is larger than the sum of its proper divisors (1).

641340311 is an equidigital number, since it uses as much as digits as its factorization.

641340311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 641340311 is about 25324.6976487381. The cubic root of 641340311 is about 862.3750424868.

Adding to 641340311 its reverse (113043146), we get a palindrome (754383457).

The spelling of 641340311 in words is "six hundred forty-one million, three hundred forty thousand, three hundred eleven".