3440209 has 2 divisors, whose sum is σ = 3440210. Its totient is φ = 3440208.

The previous prime is 3440189. The next prime is 3440237. The reversal of 3440209 is 9020443.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1742400 + 1697809 = 1320^2 + 1303^2 .

It is a cyclic number.

It is not a de Polignac number, because 3440209 - 2⁷ = 3440081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3440209.

It is not a weakly prime, because it can be changed into another prime (3440309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1720104 + 1720105.

It is an arithmetic number, because the mean of its divisors is an integer number (1720105).

Almost surely, 2^3440209 is an apocalyptic number.

It is an amenable number.

3440209 is a deficient number, since it is larger than the sum of its proper divisors (1).

3440209 is an equidigital number, since it uses as much as digits as its factorization.

3440209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 3440209 is about 1854.7800408674. The cubic root of 3440209 is about 150.9599033925.

The spelling of 3440209 in words is "three million, four hundred forty thousand, two hundred nine".