809801334773 has 2 divisors, whose sum is σ = 809801334774. Its totient is φ = 809801334772.

The previous prime is 809801334679. The next prime is 809801334791. The reversal of 809801334773 is 377433108908.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 535417085284 + 274384249489 = 731722^2 + 523817^2 .

It is a cyclic number.

It is not a de Polignac number, because 809801334773 - 2¹⁰ = 809801333749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (809801334373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404900667386 + 404900667387.

It is an arithmetic number, because the mean of its divisors is an integer number (404900667387).

Almost surely, 2^809801334773 is an apocalyptic number.

It is an amenable number.

809801334773 is a deficient number, since it is larger than the sum of its proper divisors (1).

809801334773 is an equidigital number, since it uses as much as digits as its factorization.

809801334773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 809801334773 in words is "eight hundred nine billion, eight hundred one million, three hundred thirty-four thousand, seven hundred seventy-three".