816440341 has 2 divisors, whose sum is σ = 816440342. Its totient is φ = 816440340.

The previous prime is 816440333. The next prime is 816440357. The reversal of 816440341 is 143044618.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 813447441 + 2992900 = 28521^2 + 1730^2 .

It is a cyclic number.

It is not a de Polignac number, because 816440341 - 2³ = 816440333 is a prime.

It is equal to p_41948050 and since 816440341 and 41948050 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 (816440321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408220170 + 408220171.

It is an arithmetic number, because the mean of its divisors is an integer number (408220171).

Almost surely, 2^816440341 is an apocalyptic number.

It is an amenable number.

816440341 is a deficient number, since it is larger than the sum of its proper divisors (1).

816440341 is an equidigital number, since it uses as much as digits as its factorization.

816440341 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 816440341 is about 28573.4201838002. The cubic root of 816440341 is about 934.6338051426.

Adding to 816440341 its reverse (143044618), we get a palindrome (959484959).

The spelling of 816440341 in words is "eight hundred sixteen million, four hundred forty thousand, three hundred forty-one".