328521701 has 4 divisors (see below), whose sum is σ = 328565100. Its totient is φ = 328478304.

The previous prime is 328521667. The next prime is 328521707. The reversal of 328521701 is 107125823.

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 85192900 + 243328801 = 9230^2 + 15599^2 .

It is a cyclic number.

It is not a de Polignac number, because 328521701 - 2¹⁰ = 328520677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328521707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7046 + ... + 26583.

It is an arithmetic number, because the mean of its divisors is an integer number (82141275).

Almost surely, 2^328521701 is an apocalyptic number.

It is an amenable number.

328521701 is a deficient number, since it is larger than the sum of its proper divisors (43399).

328521701 is an equidigital number, since it uses as much as digits as its factorization.

328521701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43398.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 328521701 is about 18125.1676130181. The cubic root of 328521701 is about 690.0088922750.

The spelling of 328521701 in words is "three hundred twenty-eight million, five hundred twenty-one thousand, seven hundred one".