320630313 has 4 divisors (see below), whose sum is σ = 427507088. Its totient is φ = 213753540.

The previous prime is 320630237. The next prime is 320630329. The reversal of 320630313 is 313036023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 320630313 - 2¹⁰ = 320629289 is a prime.

It is a super-2 number, since 2×320630313² = 205607595228955938, which contains 22 as substring.

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 320630313.

It is not an unprimeable number, because it can be changed into a prime (320630333) 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, 53438383 + ... + 53438388.

It is an arithmetic number, because the mean of its divisors is an integer number (106876772).

Almost surely, 2^320630313 is an apocalyptic number.

It is an amenable number.

320630313 is a deficient number, since it is larger than the sum of its proper divisors (106876775).

320630313 is a wasteful number, since it uses less digits than its factorization.

320630313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106876774.

The product of its (nonzero) digits is 972, while the sum is 21.

The square root of 320630313 is about 17906.1529369097. The cubic root of 320630313 is about 684.4391758254.

Adding to 320630313 its reverse (313036023), we get a palindrome (633666336).

The spelling of 320630313 in words is "three hundred twenty million, six hundred thirty thousand, three hundred thirteen".