2012443309 has 2 divisors, whose sum is σ = 2012443310. Its totient is φ = 2012443308.

The previous prime is 2012443271. The next prime is 2012443327. The reversal of 2012443309 is 9033442102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2003905225 + 8538084 = 44765^2 + 2922^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012443309 - 2¹⁵ = 2012410541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012443339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006221654 + 1006221655.

It is an arithmetic number, because the mean of its divisors is an integer number (1006221655).

Almost surely, 2^2012443309 is an apocalyptic number.

It is an amenable number.

2012443309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012443309 is an equidigital number, since it uses as much as digits as its factorization.

2012443309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 2012443309 is about 44860.2642546831. The cubic root of 2012443309 is about 1262.5285807862.

The spelling of 2012443309 in words is "two billion, twelve million, four hundred forty-three thousand, three hundred nine".