3998503 has 4 divisors (see below), whose sum is σ = 4043520. Its totient is φ = 3953488.

The previous prime is 3998497. The next prime is 3998521. The reversal of 3998503 is 3058993.

3998503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3058993 = 7 ⋅436999.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3998503 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 (3998003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22375 + ... + 22552.

It is an arithmetic number, because the mean of its divisors is an integer number (1010880).

Almost surely, 2^3998503 is an apocalyptic number.

3998503 is a deficient number, since it is larger than the sum of its proper divisors (45017).

3998503 is an equidigital number, since it uses as much as digits as its factorization.

3998503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45016.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 3998503 is about 1999.6257149777. The cubic root of 3998503 is about 158.7202998978.

The spelling of 3998503 in words is "three million, nine hundred ninety-eight thousand, five hundred three".