805854953 has 4 divisors (see below), whose sum is σ = 806339460. Its totient is φ = 805370448.

The previous prime is 805854947. The next prime is 805854967. The reversal of 805854953 is 359458508.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 532547929 + 273307024 = 23077^2 + 16532^2 .

It is a cyclic number.

It is not a de Polignac number, because 805854953 - 2²² = 801660649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 805854898 and 805854907.

It is not an unprimeable number, because it can be changed into a prime (805854943) 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 in 3 ways as a sum of consecutive naturals, for example, 239750 + ... + 243087.

It is an arithmetic number, because the mean of its divisors is an integer number (201584865).

Almost surely, 2^805854953 is an apocalyptic number.

It is an amenable number.

805854953 is a deficient number, since it is larger than the sum of its proper divisors (484507).

805854953 is a wasteful number, since it uses less digits than its factorization.

805854953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484506.

The product of its (nonzero) digits is 864000, while the sum is 47.

The square root of 805854953 is about 28387.5844868844. The cubic root of 805854953 is about 930.5769545929.

The spelling of 805854953 in words is "eight hundred five million, eight hundred fifty-four thousand, nine hundred fifty-three".