4089986209 has 9 divisors (see below), whose sum is σ = 4228226769. Its totient is φ = 3956132580.

The previous prime is 4089986149. The next prime is 4089986221. The reversal of 4089986209 is 9026899804.

The square root of 4089986209 is 63953.

It is a perfect power (a square), and thus also a powerful number.

4089986209 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 4089986209 - 2¹¹ = 4089984161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4089986209.

It is not an unprimeable number, because it can be changed into a prime (4089986809) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1981512 + ... + 1983574.

Almost surely, 2^4089986209 is an apocalyptic number.

4089986209 is the 63953-rd square number.

4089986209 is the 31977-th centered octagonal number.

It is an amenable number.

4089986209 is a deficient number, since it is larger than the sum of its proper divisors (138240560).

4089986209 is an frugal number, since it uses more digits than its factorization.

4089986209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4188 (or 2094 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 55.

The cubic root of 4089986209 is about 1599.2165707586.

The spelling of 4089986209 in words is "four billion, eighty-nine million, nine hundred eighty-six thousand, two hundred nine".