2104013309 has 2 divisors, whose sum is σ = 2104013310. Its totient is φ = 2104013308.

The previous prime is 2104013243. The next prime is 2104013339. The reversal of 2104013309 is 9033104012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1645924900 + 458088409 = 40570^2 + 21403^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104013309 - 2⁸ = 2104013053 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 (2104013339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052006654 + 1052006655.

It is an arithmetic number, because the mean of its divisors is an integer number (1052006655).

Almost surely, 2^2104013309 is an apocalyptic number.

It is an amenable number.

2104013309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2104013309 is an equidigital number, since it uses as much as digits as its factorization.

2104013309 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 2104013309 is about 45869.5248394836. The cubic root of 2104013309 is about 1281.3944172759.

The spelling of 2104013309 in words is "two billion, one hundred four million, thirteen thousand, three hundred nine".