2009839849 has 2 divisors, whose sum is σ = 2009839850. Its totient is φ = 2009839848.

The previous prime is 2009839829. The next prime is 2009839861. The reversal of 2009839849 is 9489389002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1575534249 + 434305600 = 39693^2 + 20840^2 .

It is a cyclic number.

It is not a de Polignac number, because 2009839849 - 2¹³ = 2009831657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2009839796 and 2009839805.

It is not a weakly prime, because it can be changed into another prime (2009839829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004919924 + 1004919925.

It is an arithmetic number, because the mean of its divisors is an integer number (1004919925).

Almost surely, 2^2009839849 is an apocalyptic number.

It is an amenable number.

2009839849 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009839849 is an equidigital number, since it uses as much as digits as its factorization.

2009839849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The square root of 2009839849 is about 44831.2374243674. The cubic root of 2009839849 is about 1261.9839093607.

The spelling of 2009839849 in words is "two billion, nine million, eight hundred thirty-nine thousand, eight hundred forty-nine".