320397163 has 4 divisors (see below), whose sum is σ = 320771880. Its totient is φ = 320022448.

The previous prime is 320397157. The next prime is 320397179. The reversal of 320397163 is 361793023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 361793023 = 571 ⋅633613.

It is a cyclic number.

It is not a de Polignac number, because 320397163 - 2¹⁷ = 320266091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320397263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186073 + ... + 187786.

It is an arithmetic number, because the mean of its divisors is an integer number (80192970).

Almost surely, 2^320397163 is an apocalyptic number.

320397163 is a deficient number, since it is larger than the sum of its proper divisors (374717).

320397163 is an equidigital number, since it uses as much as digits as its factorization.

320397163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374716.

The product of its (nonzero) digits is 20412, while the sum is 34.

The square root of 320397163 is about 17899.6414209894. The cubic root of 320397163 is about 684.2732363385.

The spelling of 320397163 in words is "three hundred twenty million, three hundred ninety-seven thousand, one hundred sixty-three".