3990559 has 4 divisors (see below), whose sum is σ = 4056040. Its totient is φ = 3925080.

The previous prime is 3990541. The next prime is 3990593. The reversal of 3990559 is 9550993.

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: 9550993 = 2251 ⋅4243.

It is a cyclic number.

It is not a de Polignac number, because 3990559 - 2⁹ = 3990047 is a prime.

It is a super-2 number, since 2×3990559² = 31849122264962, which contains 22 as substring.

It is a Duffinian number.

3990559 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990509) 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 in 3 ways as a sum of consecutive naturals, for example, 32649 + ... + 32770.

It is an arithmetic number, because the mean of its divisors is an integer number (1014010).

Almost surely, 2^3990559 is an apocalyptic number.

3990559 is a deficient number, since it is larger than the sum of its proper divisors (65481).

3990559 is an equidigital number, since it uses as much as digits as its factorization.

3990559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65480.

The product of its (nonzero) digits is 54675, while the sum is 40.

The square root of 3990559 is about 1997.6383556590. The cubic root of 3990559 is about 158.6151180338.

The spelling of 3990559 in words is "three million, nine hundred ninety thousand, five hundred fifty-nine".