840485693 has 2 divisors, whose sum is σ = 840485694. Its totient is φ = 840485692.

The previous prime is 840485687. The next prime is 840485753. The reversal of 840485693 is 396584048.

840485693 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., 719419684 + 121066009 = 26822^2 + 11003^2 .

It is a cyclic number.

It is not a de Polignac number, because 840485693 - 2⁴ = 840485677 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840485603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420242846 + 420242847.

It is an arithmetic number, because the mean of its divisors is an integer number (420242847).

Almost surely, 2^840485693 is an apocalyptic number.

It is an amenable number.

840485693 is a deficient number, since it is larger than the sum of its proper divisors (1).

840485693 is an equidigital number, since it uses as much as digits as its factorization.

840485693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 840485693 is about 28991.1312818248. The cubic root of 840485693 is about 943.7206142744.

The spelling of 840485693 in words is "eight hundred forty million, four hundred eighty-five thousand, six hundred ninety-three".