328990687 has 2 divisors, whose sum is σ = 328990688. Its totient is φ = 328990686.

The previous prime is 328990639. The next prime is 328990691. The reversal of 328990687 is 786099823.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 328990687 - 2¹⁵ = 328957919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328990637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164495343 + 164495344.

It is an arithmetic number, because the mean of its divisors is an integer number (164495344).

Almost surely, 2^328990687 is an apocalyptic number.

328990687 is a deficient number, since it is larger than the sum of its proper divisors (1).

328990687 is an equidigital number, since it uses as much as digits as its factorization.

328990687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 328990687 is about 18138.1004242451. The cubic root of 328990687 is about 690.3370802786.

The spelling of 328990687 in words is "three hundred twenty-eight million, nine hundred ninety thousand, six hundred eighty-seven".