2119905091 has 2 divisors, whose sum is σ = 2119905092. Its totient is φ = 2119905090.

The previous prime is 2119905089. The next prime is 2119905127. The reversal of 2119905091 is 1905099112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2119905091 - 2¹ = 2119905089 is a prime.

Together with 2119905089, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2119905091.

It is not a weakly prime, because it can be changed into another prime (2119905391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059952545 + 1059952546.

It is an arithmetic number, because the mean of its divisors is an integer number (1059952546).

Almost surely, 2^2119905091 is an apocalyptic number.

2119905091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2119905091 is an equidigital number, since it uses as much as digits as its factorization.

2119905091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 37.

The square root of 2119905091 is about 46042.4270754703. The cubic root of 2119905091 is about 1284.6124871267.

The spelling of 2119905091 in words is "two billion, one hundred nineteen million, nine hundred five thousand, ninety-one".