820341311 has 2 divisors, whose sum is σ = 820341312. Its totient is φ = 820341310.

The previous prime is 820341281. The next prime is 820341323. The reversal of 820341311 is 113143028.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-820341311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (820341811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410170655 + 410170656.

It is an arithmetic number, because the mean of its divisors is an integer number (410170656).

Almost surely, 2^820341311 is an apocalyptic number.

820341311 is a deficient number, since it is larger than the sum of its proper divisors (1).

820341311 is an equidigital number, since it uses as much as digits as its factorization.

820341311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 820341311 is about 28641.6010551086. The cubic root of 820341311 is about 936.1200076087.

Adding to 820341311 its reverse (113143028), we get a palindrome (933484339).

The spelling of 820341311 in words is "eight hundred twenty million, three hundred forty-one thousand, three hundred eleven".