805993 has 8 divisors (see below), whose sum is σ = 835016. Its totient is φ = 777600.

The previous prime is 805991. The next prime is 806009. The reversal of 805993 is 399508.

It can be written as a sum of positive squares in 4 ways, for example, as 36864 + 769129 = 192^2 + 877^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 805993 - 2¹ = 805991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4363 + ... + 4543.

It is an arithmetic number, because the mean of its divisors is an integer number (104377).

2⁸⁰⁵⁹⁹³ is an apocalyptic number.

It is an amenable number.

805993 is a deficient number, since it is larger than the sum of its proper divisors (29023).

805993 is a wasteful number, since it uses less digits than its factorization.

805993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 805993 is about 897.7711289633. The cubic root of 805993 is about 93.0630089061.

The spelling of 805993 in words is "eight hundred five thousand, nine hundred ninety-three".