805481143 has 2 divisors, whose sum is σ = 805481144. Its totient is φ = 805481142.

The previous prime is 805481123. The next prime is 805481207. The reversal of 805481143 is 341184508.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-805481143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 805481099 and 805481108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (805481123) 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, 402740571 + 402740572.

It is an arithmetic number, because the mean of its divisors is an integer number (402740572).

Almost surely, 2^805481143 is an apocalyptic number.

805481143 is a deficient number, since it is larger than the sum of its proper divisors (1).

805481143 is an equidigital number, since it uses as much as digits as its factorization.

805481143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 805481143 is about 28380.9996828864. Note that the first 3 decimals coincide. The cubic root of 805481143 is about 930.4330441738.

The spelling of 805481143 in words is "eight hundred five million, four hundred eighty-one thousand, one hundred forty-three".