320108605 has 8 divisors (see below), whose sum is σ = 391378392. Its totient is φ = 251254848.

The previous prime is 320108603. The next prime is 320108617. The reversal of 320108605 is 506801023.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 124835929 + 195272676 = 11173^2 + 13974^2 .

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 320108605 - 2¹ = 320108603 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 320108605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320108603) 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, 603714 + ... + 604243.

It is an arithmetic number, because the mean of its divisors is an integer number (48922299).

Almost surely, 2^320108605 is an apocalyptic number.

It is an amenable number.

320108605 is a deficient number, since it is larger than the sum of its proper divisors (71269787).

320108605 is a wasteful number, since it uses less digits than its factorization.

320108605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208015.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 320108605 is about 17891.5791645120. The cubic root of 320108605 is about 684.0677498924.

Adding to 320108605 its reverse (506801023), we get a palindrome (826909628).

The spelling of 320108605 in words is "three hundred twenty million, one hundred eight thousand, six hundred five".