809200985 has 8 divisors (see below), whose sum is σ = 984343560. Its totient is φ = 638492544.

The previous prime is 809200957. The next prime is 809200999. The reversal of 809200985 is 589002908.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 70829056 + 738371929 = 8416^2 + 27173^2 .

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 809200985 - 2¹⁴ = 809184601 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, 1108130 + ... + 1108859.

It is an arithmetic number, because the mean of its divisors is an integer number (123042945).

Almost surely, 2^809200985 is an apocalyptic number.

It is an amenable number.

809200985 is a deficient number, since it is larger than the sum of its proper divisors (175142575).

809200985 is a wasteful number, since it uses less digits than its factorization.

809200985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217067.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 809200985 is about 28446.4582153912. The cubic root of 809200985 is about 931.8631416405.

The spelling of 809200985 in words is "eight hundred nine million, two hundred thousand, nine hundred eighty-five".