109919109 has 8 divisors (see below), whose sum is σ = 146632192. Its totient is φ = 73242720.

The previous prime is 109919107. The next prime is 109919113. The reversal of 109919109 is 901919901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 109919109 - 2¹ = 109919107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109919101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1189 + ... + 14874.

It is an arithmetic number, because the mean of its divisors is an integer number (18329024).

Almost surely, 2^109919109 is an apocalyptic number.

It is an amenable number.

109919109 is a deficient number, since it is larger than the sum of its proper divisors (36713083).

109919109 is a wasteful number, since it uses less digits than its factorization.

109919109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18347.

The product of its (nonzero) digits is 6561, while the sum is 39.

The square root of 109919109 is about 10484.2314453659. The cubic root of 109919109 is about 479.0245075886.

It can be divided in two parts, 10991 and 9109, that added together give a triangular number (20100 = T₂₀₀).

The spelling of 109919109 in words is "one hundred nine million, nine hundred nineteen thousand, one hundred nine".