320064365 has 4 divisors (see below), whose sum is σ = 384077244. Its totient is φ = 256051488.

The previous prime is 320064361. The next prime is 320064383. The reversal of 320064365 is 563460023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37185604 + 282878761 = 6098^2 + 16819^2 .

It is a cyclic number.

It is not a de Polignac number, because 320064365 - 2² = 320064361 is a prime.

It is a super-3 number, since 3×320064365³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320064361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32006432 + ... + 32006441.

It is an arithmetic number, because the mean of its divisors is an integer number (96019311).

Almost surely, 2^320064365 is an apocalyptic number.

It is an amenable number.

320064365 is a deficient number, since it is larger than the sum of its proper divisors (64012879).

320064365 is an equidigital number, since it uses as much as digits as its factorization.

320064365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64012878.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 320064365 is about 17890.3427859837. The cubic root of 320064365 is about 684.0362350137.

The spelling of 320064365 in words is "three hundred twenty million, sixty-four thousand, three hundred sixty-five".