320648121 has 6 divisors (see below), whose sum is σ = 463158410. Its totient is φ = 213765408.

The previous prime is 320648117. The next prime is 320648143. The reversal of 320648121 is 121846023.

320648121 is a `hidden beast` number, since 3 + 2 + 0 + 648 + 12 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 249482025 + 71166096 = 15795^2 + 8436^2 .

It is not a de Polignac number, because 320648121 - 2² = 320648117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320641121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17813776 + ... + 17813793.

Almost surely, 2^320648121 is an apocalyptic number.

It is an amenable number.

320648121 is a deficient number, since it is larger than the sum of its proper divisors (142510289).

320648121 is a wasteful number, since it uses less digits than its factorization.

320648121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35627575 (or 35627572 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 320648121 is about 17906.6501892453. The cubic root of 320648121 is about 684.4518469784.

The spelling of 320648121 in words is "three hundred twenty million, six hundred forty-eight thousand, one hundred twenty-one".