2011030309 has 2 divisors, whose sum is σ = 2011030310. Its totient is φ = 2011030308.

The previous prime is 2011030297. The next prime is 2011030337. The reversal of 2011030309 is 9030301102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1758124900 + 252905409 = 41930^2 + 15903^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011030309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011030339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005515154 + 1005515155.

It is an arithmetic number, because the mean of its divisors is an integer number (1005515155).

Almost surely, 2^2011030309 is an apocalyptic number.

It is an amenable number.

2011030309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011030309 is an equidigital number, since it uses as much as digits as its factorization.

2011030309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 2011030309 is about 44844.5125851536. The cubic root of 2011030309 is about 1262.2330245399.

The spelling of 2011030309 in words is "two billion, eleven million, thirty thousand, three hundred nine".