320143013 has 2 divisors, whose sum is σ = 320143014. Its totient is φ = 320143012.

The previous prime is 320143009. The next prime is 320143069. The reversal of 320143013 is 310341023.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311946244 + 8196769 = 17662^2 + 2863^2 .

It is a cyclic number.

It is not a de Polignac number, because 320143013 - 2² = 320143009 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 320142982 and 320143000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320143073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160071506 + 160071507.

It is an arithmetic number, because the mean of its divisors is an integer number (160071507).

Almost surely, 2^320143013 is an apocalyptic number.

It is an amenable number.

320143013 is a deficient number, since it is larger than the sum of its proper divisors (1).

320143013 is an equidigital number, since it uses as much as digits as its factorization.

320143013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 320143013 is about 17892.5407083511. The cubic root of 320143013 is about 684.0922588241.

Adding to 320143013 its reverse (310341023), we get a palindrome (630484036).

The spelling of 320143013 in words is "three hundred twenty million, one hundred forty-three thousand, thirteen".