328638503 has 2 divisors, whose sum is σ = 328638504. Its totient is φ = 328638502.

The previous prime is 328638491. The next prime is 328638517. The reversal of 328638503 is 305836823.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 328638503 - 2⁴ = 328638487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328638553) 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 as a sum of consecutive naturals, namely, 164319251 + 164319252.

It is an arithmetic number, because the mean of its divisors is an integer number (164319252).

Almost surely, 2^328638503 is an apocalyptic number.

328638503 is a deficient number, since it is larger than the sum of its proper divisors (1).

328638503 is an equidigital number, since it uses as much as digits as its factorization.

328638503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 328638503 is about 18128.3894210159. The cubic root of 328638503 is about 690.0906574154.

The spelling of 328638503 in words is "three hundred twenty-eight million, six hundred thirty-eight thousand, five hundred three".