320313013 has 8 divisors (see below), whose sum is σ = 325863320. Its totient is φ = 314772480.

The previous prime is 320312989. The next prime is 320313017. The reversal of 320313013 is 310313023.

It can be written as a sum of positive squares in 4 ways, for example, as 9778129 + 310534884 = 3127^2 + 17622^2 .

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 320313013 - 2²¹ = 318215861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320313017) 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, 99493 + ... + 102661.

It is an arithmetic number, because the mean of its divisors is an integer number (40732915).

Almost surely, 2^320313013 is an apocalyptic number.

It is an amenable number.

320313013 is a deficient number, since it is larger than the sum of its proper divisors (5550307).

320313013 is a wasteful number, since it uses less digits than its factorization.

320313013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4887.

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 320313013 is about 17897.2906608794. The cubic root of 320313013 is about 684.2133246192.

Adding to 320313013 its reverse (310313023), we get a palindrome (630626036).

The spelling of 320313013 in words is "three hundred twenty million, three hundred thirteen thousand, thirteen".