109191914 has 12 divisors (see below), whose sum is σ = 177356646. Its totient is φ = 50396112.

The previous prime is 109191913. The next prime is 109191923. The reversal of 109191914 is 419191901.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 81450625 + 27741289 = 9025^2 + 5267^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (109191913) 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 in 5 ways as a sum of consecutive naturals, for example, 161189 + ... + 161864.

Almost surely, 2^109191914 is an apocalyptic number.

109191914 is a deficient number, since it is larger than the sum of its proper divisors (68164732).

109191914 is a wasteful number, since it uses less digits than its factorization.

109191914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323081 (or 323068 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 35.

The square root of 109191914 is about 10449.4934805473. The cubic root of 109191914 is about 477.9658040580.

The spelling of 109191914 in words is "one hundred nine million, one hundred ninety-one thousand, nine hundred fourteen".