2011985837 has 2 divisors, whose sum is σ = 2011985838. Its totient is φ = 2011985836.

The previous prime is 2011985827. The next prime is 2011985851. The reversal of 2011985837 is 7385891102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1349386756 + 662599081 = 36734^2 + 25741^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011985837 - 2¹⁰ = 2011984813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011985827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005992918 + 1005992919.

It is an arithmetic number, because the mean of its divisors is an integer number (1005992919).

Almost surely, 2^2011985837 is an apocalyptic number.

It is an amenable number.

2011985837 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011985837 is an equidigital number, since it uses as much as digits as its factorization.

2011985837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 2011985837 is about 44855.1651094944. The cubic root of 2011985837 is about 1262.4329068289.

The spelling of 2011985837 in words is "two billion, eleven million, nine hundred eighty-five thousand, eight hundred thirty-seven".