840822647107243 has 2 divisors, whose sum is σ = 840822647107244. Its totient is φ = 840822647107242.

The previous prime is 840822647107229. The next prime is 840822647107351. The reversal of 840822647107243 is 342701746228048.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840822647107243 is a prime.

It is a super-2 number, since 2×840822647107243² (a number of 31 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (840822647107643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420411323553621 + 420411323553622.

It is an arithmetic number, because the mean of its divisors is an integer number (420411323553622).

Almost surely, 2^{840822647107243} is an apocalyptic number.

840822647107243 is a deficient number, since it is larger than the sum of its proper divisors (1).

840822647107243 is an equidigital number, since it uses as much as digits as its factorization.

840822647107243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28901376, while the sum is 58.

The spelling of 840822647107243 in words is "eight hundred forty trillion, eight hundred twenty-two billion, six hundred forty-seven million, one hundred seven thousand, two hundred forty-three".