320340413 has 4 divisors (see below), whose sum is σ = 328998300. Its totient is φ = 311682528.

The previous prime is 320340407. The next prime is 320340439. The reversal of 320340413 is 314043023.

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 169468324 + 150872089 = 13018^2 + 12283^2 .

It is a cyclic number.

It is not a de Polignac number, because 320340413 - 2¹⁰ = 320339389 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 (320340443) 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, 4328888 + ... + 4328961.

It is an arithmetic number, because the mean of its divisors is an integer number (82249575).

Almost surely, 2^320340413 is an apocalyptic number.

It is an amenable number.

320340413 is a deficient number, since it is larger than the sum of its proper divisors (8657887).

320340413 is an equidigital number, since it uses as much as digits as its factorization.

320340413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8657886.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 320340413 is about 17898.0561235012. The cubic root of 320340413 is about 684.2328335680.

Adding to 320340413 its reverse (314043023), we get a palindrome (634383436).

The spelling of 320340413 in words is "three hundred twenty million, three hundred forty thousand, four hundred thirteen".