109191223 has 4 divisors (see below), whose sum is σ = 109924200. Its totient is φ = 108458248.

The previous prime is 109191217. The next prime is 109191239. The reversal of 109191223 is 322191901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322191901 = 109 ⋅2955889.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109191223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 109191191 and 109191200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109191623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366265 + ... + 366562.

It is an arithmetic number, because the mean of its divisors is an integer number (27481050).

Almost surely, 2^109191223 is an apocalyptic number.

109191223 is a deficient number, since it is larger than the sum of its proper divisors (732977).

109191223 is an equidigital number, since it uses as much as digits as its factorization.

109191223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732976.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 109191223 is about 10449.4604166914. The cubic root of 109191223 is about 477.9647958177.

The spelling of 109191223 in words is "one hundred nine million, one hundred ninety-one thousand, two hundred twenty-three".