840671124389 has 2 divisors, whose sum is σ = 840671124390. Its totient is φ = 840671124388.

The previous prime is 840671124347. The next prime is 840671124533. The reversal of 840671124389 is 983421176048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 737923950625 + 102747173764 = 859025^2 + 320542^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840671124389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 840671124389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840671123389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420335562194 + 420335562195.

It is an arithmetic number, because the mean of its divisors is an integer number (420335562195).

Almost surely, 2^840671124389 is an apocalyptic number.

It is an amenable number.

840671124389 is a deficient number, since it is larger than the sum of its proper divisors (1).

840671124389 is an equidigital number, since it uses as much as digits as its factorization.

840671124389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 840671124389 in words is "eight hundred forty billion, six hundred seventy-one million, one hundred twenty-four thousand, three hundred eighty-nine".