840118973 has 2 divisors, whose sum is σ = 840118974. Its totient is φ = 840118972.

The previous prime is 840118969. The next prime is 840118997. The reversal of 840118973 is 379811048.

840118973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 472323289 + 367795684 = 21733^2 + 19178^2 .

It is a cyclic number.

It is not a de Polignac number, because 840118973 - 2² = 840118969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 840118973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840118913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420059486 + 420059487.

It is an arithmetic number, because the mean of its divisors is an integer number (420059487).

Almost surely, 2^840118973 is an apocalyptic number.

It is an amenable number.

840118973 is a deficient number, since it is larger than the sum of its proper divisors (1).

840118973 is an equidigital number, since it uses as much as digits as its factorization.

840118973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 840118973 is about 28984.8058989533. The cubic root of 840118973 is about 943.5833398498.

The spelling of 840118973 in words is "eight hundred forty million, one hundred eighteen thousand, nine hundred seventy-three".