2013321209 has 2 divisors, whose sum is σ = 2013321210. Its totient is φ = 2013321208.

The previous prime is 2013321199. The next prime is 2013321253. The reversal of 2013321209 is 9021233102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1697192809 + 316128400 = 41197^2 + 17780^2 .

It is a cyclic number.

It is not a de Polignac number, because 2013321209 - 2¹² = 2013317113 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2013321109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006660604 + 1006660605.

It is an arithmetic number, because the mean of its divisors is an integer number (1006660605).

Almost surely, 2^2013321209 is an apocalyptic number.

It is an amenable number.

2013321209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2013321209 is an equidigital number, since it uses as much as digits as its factorization.

2013321209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 2013321209 is about 44870.0480164664. The cubic root of 2013321209 is about 1262.7121408570.

The spelling of 2013321209 in words is "two billion, thirteen million, three hundred twenty-one thousand, two hundred nine".