2985806909 has 2 divisors, whose sum is σ = 2985806910. Its totient is φ = 2985806908.

The previous prime is 2985806869. The next prime is 2985806981. The reversal of 2985806909 is 9096085892.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2947404100 + 38402809 = 54290^2 + 6197^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2985806909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2985806209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1492903454 + 1492903455.

It is an arithmetic number, because the mean of its divisors is an integer number (1492903455).

Almost surely, 2^2985806909 is an apocalyptic number.

It is an amenable number.

2985806909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2985806909 is an equidigital number, since it uses as much as digits as its factorization.

2985806909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2799360, while the sum is 56.

The square root of 2985806909 is about 54642.5375417357. The cubic root of 2985806909 is about 1439.9715318768.

The spelling of 2985806909 in words is "two billion, nine hundred eighty-five million, eight hundred six thousand, nine hundred nine".