800840797 has 2 divisors, whose sum is σ = 800840798. Its totient is φ = 800840796.

The previous prime is 800840783. The next prime is 800840801. The reversal of 800840797 is 797048008.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 800833401 + 7396 = 28299^2 + 86^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800840797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (800840717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400420398 + 400420399.

It is an arithmetic number, because the mean of its divisors is an integer number (400420399).

Almost surely, 2^800840797 is an apocalyptic number.

It is an amenable number.

800840797 is a deficient number, since it is larger than the sum of its proper divisors (1).

800840797 is an equidigital number, since it uses as much as digits as its factorization.

800840797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 800840797 is about 28299.1306756939. The cubic root of 800840797 is about 928.6428723514.

The spelling of 800840797 in words is "eight hundred million, eight hundred forty thousand, seven hundred ninety-seven".