109199191 has 2 divisors, whose sum is σ = 109199192. Its totient is φ = 109199190.

The previous prime is 109199161. The next prime is 109199197. The reversal of 109199191 is 191991901.

It is a strong prime.

It is an emirp because it is prime and its reverse (191991901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109199191 - 2⁵ = 109199159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109199197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54599595 + 54599596.

It is an arithmetic number, because the mean of its divisors is an integer number (54599596).

Almost surely, 2^109199191 is an apocalyptic number.

109199191 is a deficient number, since it is larger than the sum of its proper divisors (1).

109199191 is an equidigital number, since it uses as much as digits as its factorization.

109199191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6561, while the sum is 40.

The square root of 109199191 is about 10449.8416734418. The cubic root of 109199191 is about 477.9764216937.

The spelling of 109199191 in words is "one hundred nine million, one hundred ninety-nine thousand, one hundred ninety-one".