2108499091 has 2 divisors, whose sum is σ = 2108499092. Its totient is φ = 2108499090.

The previous prime is 2108499047. The next prime is 2108499121. The reversal of 2108499091 is 1909948012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2108499091 - 2¹¹ = 2108497043 is a prime.

It is not a weakly prime, because it can be changed into another prime (2108499011) 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, 1054249545 + 1054249546.

It is an arithmetic number, because the mean of its divisors is an integer number (1054249546).

Almost surely, 2^2108499091 is an apocalyptic number.

2108499091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2108499091 is an equidigital number, since it uses as much as digits as its factorization.

2108499091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 2108499091 is about 45918.3959976827. The cubic root of 2108499091 is about 1282.3044203707.

The spelling of 2108499091 in words is "two billion, one hundred eight million, four hundred ninety-nine thousand, ninety-one".