320320609 has 16 divisors (see below), whose sum is σ = 382821120. Its totient is φ = 262553280.

The previous prime is 320320603. The next prime is 320320619. The reversal of 320320609 is 906023023.

It is not a de Polignac number, because 320320609 - 2¹³ = 320312417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320320603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83289 + ... + 87049.

It is an arithmetic number, because the mean of its divisors is an integer number (23926320).

Almost surely, 2^320320609 is an apocalyptic number.

It is an amenable number.

320320609 is a deficient number, since it is larger than the sum of its proper divisors (62500511).

320320609 is an frugal number, since it uses more digits than its factorization.

320320609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837 (or 3791 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 320320609 is about 17897.5028705124. The cubic root of 320320609 is about 684.2187331239.

The spelling of 320320609 in words is "three hundred twenty million, three hundred twenty thousand, six hundred nine".