109838191 has 2 divisors, whose sum is σ = 109838192. Its totient is φ = 109838190.

The previous prime is 109838189. The next prime is 109838213. The reversal of 109838191 is 191838901.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109838191 - 2¹ = 109838189 is a prime.

Together with 109838189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109838161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54919095 + 54919096.

It is an arithmetic number, because the mean of its divisors is an integer number (54919096).

Almost surely, 2^109838191 is an apocalyptic number.

109838191 is a deficient number, since it is larger than the sum of its proper divisors (1).

109838191 is an equidigital number, since it uses as much as digits as its factorization.

109838191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 40.

The square root of 109838191 is about 10480.3717014236. The cubic root of 109838191 is about 478.9069325799.

The spelling of 109838191 in words is "one hundred nine million, eight hundred thirty-eight thousand, one hundred ninety-one".