2071881709 has 2 divisors, whose sum is σ = 2071881710. Its totient is φ = 2071881708.

The previous prime is 2071881703. The next prime is 2071881719. The reversal of 2071881709 is 9071881702.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1791151684 + 280730025 = 42322^2 + 16755^2 .

It is a cyclic number.

It is not a de Polignac number, because 2071881709 - 2⁵ = 2071881677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2071881703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1035940854 + 1035940855.

It is an arithmetic number, because the mean of its divisors is an integer number (1035940855).

Almost surely, 2^2071881709 is an apocalyptic number.

It is an amenable number.

2071881709 is a deficient number, since it is larger than the sum of its proper divisors (1).

2071881709 is an equidigital number, since it uses as much as digits as its factorization.

2071881709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 43.

The square root of 2071881709 is about 45517.9273363803. The cubic root of 2071881709 is about 1274.8379563895.

The spelling of 2071881709 in words is "two billion, seventy-one million, eight hundred eighty-one thousand, seven hundred nine".