328450561 has 2 divisors, whose sum is σ = 328450562. Its totient is φ = 328450560.

The previous prime is 328450559. The next prime is 328450571. The reversal of 328450561 is 165054823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200760561 + 127690000 = 14169^2 + 11300^2 .

It is an emirp because it is prime and its reverse (165054823) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 328450561 - 2¹ = 328450559 is a prime.

Together with 328450559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (328450571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164225280 + 164225281.

It is an arithmetic number, because the mean of its divisors is an integer number (164225281).

Almost surely, 2^328450561 is an apocalyptic number.

It is an amenable number.

328450561 is a deficient number, since it is larger than the sum of its proper divisors (1).

328450561 is an equidigital number, since it uses as much as digits as its factorization.

328450561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 328450561 is about 18123.2050421552. The cubic root of 328450561 is about 689.9590824997.

The spelling of 328450561 in words is "three hundred twenty-eight million, four hundred fifty thousand, five hundred sixty-one".