820341343 has 2 divisors, whose sum is σ = 820341344. Its totient is φ = 820341342.

The previous prime is 820341323. The next prime is 820341349. The reversal of 820341343 is 343143028.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 820341343 - 2⁵ = 820341311 is a prime.

It is equal to p_42138118 and since 820341343 and 42138118 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (820341349) 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, 410170671 + 410170672.

It is an arithmetic number, because the mean of its divisors is an integer number (410170672).

Almost surely, 2^820341343 is an apocalyptic number.

820341343 is a deficient number, since it is larger than the sum of its proper divisors (1).

820341343 is an equidigital number, since it uses as much as digits as its factorization.

820341343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 820341343 is about 28641.6016137366. The cubic root of 820341343 is about 936.1200197808.

The spelling of 820341343 in words is "eight hundred twenty million, three hundred forty-one thousand, three hundred forty-three".