320912065 has 8 divisors (see below), whose sum is σ = 386748648. Its totient is φ = 255626880.

The previous prime is 320912041. The next prime is 320912069. The reversal of 320912065 is 560219023.

It can be written as a sum of positive squares in 4 ways, for example, as 6594624 + 314317441 = 2568^2 + 17729^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320912065 - 2⁷ = 320911937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320912069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136566 + ... + 138895.

It is an arithmetic number, because the mean of its divisors is an integer number (48343581).

Almost surely, 2^320912065 is an apocalyptic number.

It is an amenable number.

320912065 is a deficient number, since it is larger than the sum of its proper divisors (65836583).

320912065 is a wasteful number, since it uses less digits than its factorization.

320912065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275699.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 320912065 is about 17914.0186725369. The cubic root of 320912065 is about 684.6395994287.

The spelling of 320912065 in words is "three hundred twenty million, nine hundred twelve thousand, sixty-five".