2009771 has 2 divisors, whose sum is σ = 2009772. Its totient is φ = 2009770.

The previous prime is 2009759. The next prime is 2009783. The reversal of 2009771 is 1779002.

It is a balanced prime because it is at equal distance from previous prime (2009759) and next prime (2009783).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2009771 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2009771.

It is not a weakly prime, because it can be changed into another prime (2009731) 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, 1004885 + 1004886.

It is an arithmetic number, because the mean of its divisors is an integer number (1004886).

2^2009771 is an apocalyptic number.

2009771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009771 is an equidigital number, since it uses as much as digits as its factorization.

2009771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 882, while the sum is 26.

The square root of 2009771 is about 1417.6639235023. The cubic root of 2009771 is about 126.1969499038.

The spelling of 2009771 in words is "two million, nine thousand, seven hundred seventy-one".