840938341 has 2 divisors, whose sum is σ = 840938342. Its totient is φ = 840938340.

The previous prime is 840938311. The next prime is 840938363. The reversal of 840938341 is 143839048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 589081441 + 251856900 = 24271^2 + 15870^2 .

It is a cyclic number.

It is not a de Polignac number, because 840938341 - 2⁹ = 840937829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 840938294 and 840938303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840938311) 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, 420469170 + 420469171.

It is an arithmetic number, because the mean of its divisors is an integer number (420469171).

Almost surely, 2^840938341 is an apocalyptic number.

It is an amenable number.

840938341 is a deficient number, since it is larger than the sum of its proper divisors (1).

840938341 is an equidigital number, since it uses as much as digits as its factorization.

840938341 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 840938341 is about 28998.9368943070. The cubic root of 840938341 is about 943.8899991073.

The spelling of 840938341 in words is "eight hundred forty million, nine hundred thirty-eight thousand, three hundred forty-one".