320113643 has 2 divisors, whose sum is σ = 320113644. Its totient is φ = 320113642.

The previous prime is 320113639. The next prime is 320113649. The reversal of 320113643 is 346311023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320113643 - 2² = 320113639 is a prime.

It is not a weakly prime, because it can be changed into another prime (320113649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160056821 + 160056822.

It is an arithmetic number, because the mean of its divisors is an integer number (160056822).

Almost surely, 2^320113643 is an apocalyptic number.

320113643 is a deficient number, since it is larger than the sum of its proper divisors (1).

320113643 is an equidigital number, since it uses as much as digits as its factorization.

320113643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 320113643 is about 17891.7199564491. The cubic root of 320113643 is about 684.0713385861.

Adding to 320113643 its reverse (346311023), we get a palindrome (666424666).

The spelling of 320113643 in words is "three hundred twenty million, one hundred thirteen thousand, six hundred forty-three".