109105091 has 2 divisors, whose sum is σ = 109105092. Its totient is φ = 109105090.

The previous prime is 109105079. The next prime is 109105159. The reversal of 109105091 is 190501901.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109105091 - 2¹⁸ = 108842947 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109105091.

It is not a weakly prime, because it can be changed into another prime (109105021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54552545 + 54552546.

It is an arithmetic number, because the mean of its divisors is an integer number (54552546).

Almost surely, 2^109105091 is an apocalyptic number.

109105091 is a deficient number, since it is larger than the sum of its proper divisors (1).

109105091 is an equidigital number, since it uses as much as digits as its factorization.

109105091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 405, while the sum is 26.

The square root of 109105091 is about 10445.3382424888. The cubic root of 109105091 is about 477.8390870165.

Adding to 109105091 its reverse (190501901), we get a palindrome (299606992).

The spelling of 109105091 in words is "one hundred nine million, one hundred five thousand, ninety-one".