320817085 has 4 divisors (see below), whose sum is σ = 384980508. Its totient is φ = 256653664.

The previous prime is 320817083. The next prime is 320817157. The reversal of 320817085 is 580718023.

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 155077209 + 165739876 = 12453^2 + 12874^2 .

It is a cyclic number.

It is not a de Polignac number, because 320817085 - 2¹ = 320817083 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320817085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320817083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32081704 + ... + 32081713.

It is an arithmetic number, because the mean of its divisors is an integer number (96245127).

Almost surely, 2^320817085 is an apocalyptic number.

It is an amenable number.

320817085 is a deficient number, since it is larger than the sum of its proper divisors (64163423).

320817085 is an equidigital number, since it uses as much as digits as its factorization.

320817085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64163422.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 320817085 is about 17911.3674798995. The cubic root of 320817085 is about 684.5720487478.

The spelling of 320817085 in words is "three hundred twenty million, eight hundred seventeen thousand, eighty-five".