805980943 has 2 divisors, whose sum is σ = 805980944. Its totient is φ = 805980942.

The previous prime is 805980941. The next prime is 805980971. The reversal of 805980943 is 349089508.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 805980943 - 2¹ = 805980941 is a prime.

Together with 805980941, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 805980893 and 805980902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (805980941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402990471 + 402990472.

It is an arithmetic number, because the mean of its divisors is an integer number (402990472).

Almost surely, 2^805980943 is an apocalyptic number.

805980943 is a deficient number, since it is larger than the sum of its proper divisors (1).

805980943 is an equidigital number, since it uses as much as digits as its factorization.

805980943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 805980943 is about 28389.8035040752. The cubic root of 805980943 is about 930.6254485477.

The spelling of 805980943 in words is "eight hundred five million, nine hundred eighty thousand, nine hundred forty-three".