799985 has 8 divisors (see below), whose sum is σ = 966120. Its totient is φ = 635904.

The previous prime is 799979. The next prime is 799991. The reversal of 799985 is 589997.

799985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (799979) and next prime (799991).

It can be written as a sum of positive squares in 4 ways, for example, as 39601 + 760384 = 199^2 + 872^2 .

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 799985 - 2⁶ = 799921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551 + ... + 1379.

It is an arithmetic number, because the mean of its divisors is an integer number (120765).

2⁷⁹⁹⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

799985 is a deficient number, since it is larger than the sum of its proper divisors (166135).

799985 is a wasteful number, since it uses less digits than its factorization.

799985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027.

The product of its digits is 204120, while the sum is 47.

The square root of 799985 is about 894.4188057057. The cubic root of 799985 is about 92.8311964700.

The spelling of 799985 in words is "seven hundred ninety-nine thousand, nine hundred eighty-five".