2056909 has 2 divisors, whose sum is σ = 2056910. Its totient is φ = 2056908.

The previous prime is 2056907. The next prime is 2056919. The reversal of 2056909 is 9096502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1432809 + 624100 = 1197^2 + 790^2 .

It is a cyclic number.

It is not a de Polignac number, because 2056909 - 2¹ = 2056907 is a prime.

Together with 2056907, it forms a pair of twin primes.

It is a Chen prime.

2056909 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2056903) 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, 1028454 + 1028455.

It is an arithmetic number, because the mean of its divisors is an integer number (1028455).

2^2056909 is an apocalyptic number.

It is an amenable number.

2056909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2056909 is an equidigital number, since it uses as much as digits as its factorization.

2056909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 2056909 is about 1434.1928043328. The cubic root of 2056909 is about 127.1759604439.

The spelling of 2056909 in words is "two million, fifty-six thousand, nine hundred nine".