2104238891 has 2 divisors, whose sum is σ = 2104238892. Its totient is φ = 2104238890.

The previous prime is 2104238867. The next prime is 2104238893. The reversal of 2104238891 is 1988324012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2104238891 - 2²² = 2100044587 is a prime.

It is a Sophie Germain prime.

Together with 2104238893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2104238893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052119445 + 1052119446.

It is an arithmetic number, because the mean of its divisors is an integer number (1052119446).

Almost surely, 2^2104238891 is an apocalyptic number.

2104238891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2104238891 is an equidigital number, since it uses as much as digits as its factorization.

2104238891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 2104238891 is about 45871.9837264533. The cubic root of 2104238891 is about 1281.4402105834.

The spelling of 2104238891 in words is "two billion, one hundred four million, two hundred thirty-eight thousand, eight hundred ninety-one".