3998539 has 2 divisors, whose sum is σ = 3998540. Its totient is φ = 3998538.

The previous prime is 3998537. The next prime is 3998551. The reversal of 3998539 is 9358993.

3998539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3998539 - 2¹ = 3998537 is a prime.

Together with 3998537, it forms a pair of twin primes.

It is a Chen prime.

3998539 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3998537) 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 as a sum of consecutive naturals, namely, 1999269 + 1999270.

It is an arithmetic number, because the mean of its divisors is an integer number (1999270).

Almost surely, 2^3998539 is an apocalyptic number.

3998539 is a deficient number, since it is larger than the sum of its proper divisors (1).

3998539 is an equidigital number, since it uses as much as digits as its factorization.

3998539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 46.

The square root of 3998539 is about 1999.6347166420. The cubic root of 3998539 is about 158.7207762355.

The spelling of 3998539 in words is "three million, nine hundred ninety-eight thousand, five hundred thirty-nine".