328621121 has 4 divisors (see below), whose sum is σ = 328685700. Its totient is φ = 328556544.

The previous prime is 328621099. The next prime is 328621129. The reversal of 328621121 is 121126823.

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 94867600 + 233753521 = 9740^2 + 15289^2 .

It is a cyclic number.

It is not a de Polignac number, because 328621121 - 2¹⁴ = 328604737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328621129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23936 + ... + 35073.

It is an arithmetic number, because the mean of its divisors is an integer number (82171425).

Almost surely, 2^328621121 is an apocalyptic number.

It is an amenable number.

328621121 is a deficient number, since it is larger than the sum of its proper divisors (64579).

328621121 is an equidigital number, since it uses as much as digits as its factorization.

328621121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64578.

The product of its digits is 1152, while the sum is 26.

The square root of 328621121 is about 18127.9100008799. The cubic root of 328621121 is about 690.0784906859.

Adding to 328621121 its reverse (121126823), we get a palindrome (449747944).

The spelling of 328621121 in words is "three hundred twenty-eight million, six hundred twenty-one thousand, one hundred twenty-one".