2013011909 has 2 divisors, whose sum is σ = 2013011910. Its totient is φ = 2013011908.

The previous prime is 2013011881. The next prime is 2013011941. The reversal of 2013011909 is 9091103102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1600800100 + 412211809 = 40010^2 + 20303^2 .

It is a cyclic number.

It is not a de Polignac number, because 2013011909 - 2²⁸ = 1744576453 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2013011989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006505954 + 1006505955.

It is an arithmetic number, because the mean of its divisors is an integer number (1006505955).

Almost surely, 2^2013011909 is an apocalyptic number.

It is an amenable number.

2013011909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2013011909 is an equidigital number, since it uses as much as digits as its factorization.

2013011909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 2013011909 is about 44866.6012641921. The cubic root of 2013011909 is about 1262.6474754234.

The spelling of 2013011909 in words is "two billion, thirteen million, eleven thousand, nine hundred nine".