3409209 has 10 divisors (see below), whose sum is σ = 5092890. Its totient is φ = 2272752.

The previous prime is 3409201. The next prime is 3409213. The reversal of 3409209 is 9029043.

It can be written as a sum of positive squares in only one way, i.e., 3404025 + 5184 = 1845^2 + 72^2 .

It is not a de Polignac number, because 3409209 - 2³ = 3409201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (3409201) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 20964 + ... + 21125.

It is an arithmetic number, because the mean of its divisors is an integer number (509289).

Almost surely, 2^3409209 is an apocalyptic number.

It is an amenable number.

3409209 is a deficient number, since it is larger than the sum of its proper divisors (1683681).

3409209 is an equidigital number, since it uses as much as digits as its factorization.

3409209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42101 (or 42092 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 3409209 is about 1846.4043435824. The cubic root of 3409209 is about 150.5050972693.

The spelling of 3409209 in words is "three million, four hundred nine thousand, two hundred nine".