328990663 has 4 divisors (see below), whose sum is σ = 335198088. Its totient is φ = 322783240.

The previous prime is 328990639. The next prime is 328990687. The reversal of 328990663 is 366099823.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366099823 = 191 ⋅1916753.

It is an interprime number because it is at equal distance from previous prime (328990639) and next prime (328990687).

It is a cyclic number.

It is not a de Polignac number, because 328990663 - 2¹³ = 328982471 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 (328990163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3103633 + ... + 3103738.

It is an arithmetic number, because the mean of its divisors is an integer number (83799522).

Almost surely, 2^328990663 is an apocalyptic number.

328990663 is a deficient number, since it is larger than the sum of its proper divisors (6207425).

328990663 is an equidigital number, since it uses as much as digits as its factorization.

328990663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6207424.

The product of its (nonzero) digits is 419904, while the sum is 46.

The square root of 328990663 is about 18138.0997626543. The cubic root of 328990663 is about 690.3370634918.

The spelling of 328990663 in words is "three hundred twenty-eight million, nine hundred ninety thousand, six hundred sixty-three".