840533797 has 2 divisors, whose sum is σ = 840533798. Its totient is φ = 840533796.

The previous prime is 840533741. The next prime is 840533801. The reversal of 840533797 is 797335048.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 697276836 + 143256961 = 26406^2 + 11969^2 .

It is a cyclic number.

It is not a de Polignac number, because 840533797 - 2¹⁹ = 840009509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840533297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420266898 + 420266899.

It is an arithmetic number, because the mean of its divisors is an integer number (420266899).

Almost surely, 2^840533797 is an apocalyptic number.

It is an amenable number.

840533797 is a deficient number, since it is larger than the sum of its proper divisors (1).

840533797 is an equidigital number, since it uses as much as digits as its factorization.

840533797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 46.

The square root of 840533797 is about 28991.9609029814. The cubic root of 840533797 is about 943.7386180988.

The spelling of 840533797 in words is "eight hundred forty million, five hundred thirty-three thousand, seven hundred ninety-seven".