109091911 has 2 divisors, whose sum is σ = 109091912. Its totient is φ = 109091910.

The previous prime is 109091893. The next prime is 109091933. The reversal of 109091911 is 119190901.

It is a weak prime.

It is an emirp because it is prime and its reverse (119190901) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 116160601 and 106061611.

It is a cyclic number.

It is not a de Polignac number, because 109091911 - 2⁹ = 109091399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109091951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54545955 + 54545956.

It is an arithmetic number, because the mean of its divisors is an integer number (54545956).

Almost surely, 2^109091911 is an apocalyptic number.

109091911 is a deficient number, since it is larger than the sum of its proper divisors (1).

109091911 is an equidigital number, since it uses as much as digits as its factorization.

109091911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729, while the sum is 31.

The square root of 109091911 is about 10444.7073199779. The cubic root of 109091911 is about 477.8198451011.

The spelling of 109091911 in words is "one hundred nine million, ninety-one thousand, nine hundred eleven".