328364921 has 2 divisors, whose sum is σ = 328364922. Its totient is φ = 328364920.

The previous prime is 328364903. The next prime is 328364957. The reversal of 328364921 is 129463823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260467321 + 67897600 = 16139^2 + 8240^2 .

It is a cyclic number.

It is not a de Polignac number, because 328364921 - 2¹⁸ = 328102777 is a prime.

It is not a weakly prime, because it can be changed into another prime (328364021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164182460 + 164182461.

It is an arithmetic number, because the mean of its divisors is an integer number (164182461).

Almost surely, 2^328364921 is an apocalyptic number.

It is an amenable number.

328364921 is a deficient number, since it is larger than the sum of its proper divisors (1).

328364921 is an equidigital number, since it uses as much as digits as its factorization.

328364921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 328364921 is about 18120.8421713782. The cubic root of 328364921 is about 689.8991107829.

The spelling of 328364921 in words is "three hundred twenty-eight million, three hundred sixty-four thousand, nine hundred twenty-one".