3990329 has 4 divisors (see below), whose sum is σ = 4560384. Its totient is φ = 3420276.

The previous prime is 3990307. The next prime is 3990331. The reversal of 3990329 is 9230993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9230993 = 1171 ⋅7883.

It is a cyclic number.

It is not a de Polignac number, because 3990329 - 2⁸ = 3990073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3990379) 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, 285017 + ... + 285030.

It is an arithmetic number, because the mean of its divisors is an integer number (1140096).

Almost surely, 2^3990329 is an apocalyptic number.

It is an amenable number.

3990329 is a deficient number, since it is larger than the sum of its proper divisors (570055).

3990329 is an equidigital number, since it uses as much as digits as its factorization.

3990329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570054.

The product of its (nonzero) digits is 13122, while the sum is 35.

The square root of 3990329 is about 1997.5807868519. The cubic root of 3990329 is about 158.6120706597.

The spelling of 3990329 in words is "three million, nine hundred ninety thousand, three hundred twenty-nine".