3998109 has 16 divisors (see below), whose sum is σ = 5532800. Its totient is φ = 2566080.

The previous prime is 3998107. The next prime is 3998119. The reversal of 3998109 is 9018993.

3998109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3998109 - 2¹ = 3998107 is a prime.

It is a Duffinian number.

3998109 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998107) 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 15 ways as a sum of consecutive naturals, for example, 19992 + ... + 20190.

It is an arithmetic number, because the mean of its divisors is an integer number (345800).

Almost surely, 2^3998109 is an apocalyptic number.

It is an amenable number.

3998109 is a deficient number, since it is larger than the sum of its proper divisors (1534691).

3998109 is a wasteful number, since it uses less digits than its factorization.

3998109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 3998109 is about 1999.5271941136. The cubic root of 3998109 is about 158.7150864590.

The spelling of 3998109 in words is "three million, nine hundred ninety-eight thousand, one hundred nine".