805439473 has 2 divisors, whose sum is σ = 805439474. Its totient is φ = 805439472.

The previous prime is 805439443. The next prime is 805439513. The reversal of 805439473 is 374934508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 524776464 + 280663009 = 22908^2 + 16753^2 .

It is a cyclic number.

It is not a de Polignac number, because 805439473 - 2²⁵ = 771885041 is a prime.

It is not a weakly prime, because it can be changed into another prime (805439443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402719736 + 402719737.

It is an arithmetic number, because the mean of its divisors is an integer number (402719737).

Almost surely, 2^805439473 is an apocalyptic number.

It is an amenable number.

805439473 is a deficient number, since it is larger than the sum of its proper divisors (1).

805439473 is an equidigital number, since it uses as much as digits as its factorization.

805439473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 805439473 is about 28380.2655554877. The cubic root of 805439473 is about 930.4169991826.

The spelling of 805439473 in words is "eight hundred five million, four hundred thirty-nine thousand, four hundred seventy-three".