809846893 has 2 divisors, whose sum is σ = 809846894. Its totient is φ = 809846892.

The previous prime is 809846881. The next prime is 809846903. The reversal of 809846893 is 398648908.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 774954244 + 34892649 = 27838^2 + 5907^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-809846893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (809846393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404923446 + 404923447.

It is an arithmetic number, because the mean of its divisors is an integer number (404923447).

Almost surely, 2^809846893 is an apocalyptic number.

It is an amenable number.

809846893 is a deficient number, since it is larger than the sum of its proper divisors (1).

809846893 is an equidigital number, since it uses as much as digits as its factorization.

809846893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2985984, while the sum is 55.

The square root of 809846893 is about 28457.8089985860. The cubic root of 809846893 is about 932.1110148695. Note that the first 3 decimals are identical.

The spelling of 809846893 in words is "eight hundred nine million, eight hundred forty-six thousand, eight hundred ninety-three".