320123365 has 4 divisors (see below), whose sum is σ = 384148044. Its totient is φ = 256098688.

The previous prime is 320123359. The next prime is 320123389. The reversal of 320123365 is 563321023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 563321023 = 7873 ⋅71551.

It can be written as a sum of positive squares in 2 ways, for example, as 123254404 + 196868961 = 11102^2 + 14031^2 .

It is a cyclic number.

It is not a de Polignac number, because 320123365 - 2²³ = 311734757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32012332 + ... + 32012341.

It is an arithmetic number, because the mean of its divisors is an integer number (96037011).

Almost surely, 2^320123365 is an apocalyptic number.

It is an amenable number.

320123365 is a deficient number, since it is larger than the sum of its proper divisors (64024679).

320123365 is an equidigital number, since it uses as much as digits as its factorization.

320123365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64024678.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 320123365 is about 17891.9916443084. The cubic root of 320123365 is about 684.0782637041.

Adding to 320123365 its reverse (563321023), we get a palindrome (883444388).

The spelling of 320123365 in words is "three hundred twenty million, one hundred twenty-three thousand, three hundred sixty-five".