2069909 has 2 divisors, whose sum is σ = 2069910. Its totient is φ = 2069908.

The previous prime is 2069887. The next prime is 2069911. The reversal of 2069909 is 9099602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1697809 + 372100 = 1303^2 + 610^2 .

It is a cyclic number.

It is not a de Polignac number, because 2069909 - 2²⁰ = 1021333 is a prime.

Together with 2069911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2069929) 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, 1034954 + 1034955.

It is an arithmetic number, because the mean of its divisors is an integer number (1034955).

2^2069909 is an apocalyptic number.

It is an amenable number.

2069909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2069909 is an equidigital number, since it uses as much as digits as its factorization.

2069909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 2069909 is about 1438.7178319601. The cubic root of 2069909 is about 127.4433222392.

The spelling of 2069909 in words is "two million, sixty-nine thousand, nine hundred nine".