320003161 has 2 divisors, whose sum is σ = 320003162. Its totient is φ = 320003160.

The previous prime is 320003153. The next prime is 320003179. The reversal of 320003161 is 161300023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219602761 + 100400400 = 14819^2 + 10020^2 .

It is an emirp because it is prime and its reverse (161300023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320003161 - 2³ = 320003153 is a prime.

It is a super-3 number, since 3×320003161³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (320003191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160001580 + 160001581.

It is an arithmetic number, because the mean of its divisors is an integer number (160001581).

Almost surely, 2^320003161 is an apocalyptic number.

It is an amenable number.

320003161 is a deficient number, since it is larger than the sum of its proper divisors (1).

320003161 is an equidigital number, since it uses as much as digits as its factorization.

320003161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 320003161 is about 17888.6321724161. The cubic root of 320003161 is about 683.9926308441.

Adding to 320003161 its reverse (161300023), we get a palindrome (481303184).

The spelling of 320003161 in words is "three hundred twenty million, three thousand, one hundred sixty-one".