2069209 has 2 divisors, whose sum is σ = 2069210. Its totient is φ = 2069208.

The previous prime is 2069191. The next prime is 2069213. The reversal of 2069209 is 9029602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1108809 + 960400 = 1053^2 + 980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2069209 is a prime.

2069209 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2069239) 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 as a sum of consecutive naturals, namely, 1034604 + 1034605.

It is an arithmetic number, because the mean of its divisors is an integer number (1034605).

2^2069209 is an apocalyptic number.

It is an amenable number.

2069209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2069209 is an equidigital number, since it uses as much as digits as its factorization.

2069209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 2069209 is about 1438.4745392255. The cubic root of 2069209 is about 127.4289543960.

It can be divided in two parts, 2069 and 209, that added together give a triangular number (2278 = T₆₇).

The spelling of 2069209 in words is "two million, sixty-nine thousand, two hundred nine".